total float and independent float . (1) shows a graphical representation for the popular float types, which are discussed in the next section. Interfering float: Interfering float refers to the delay in starting a task rather than a delay in finishing it. words,Given the following snapshot AON answer the following questions: Total Float for Activity K = Free Float for Activity S = Total Float for Activity Q = Free Float for Activity Q = Interfering Float for Activity Q =2. 45 minutes for driving and getting to my seat. 1: (a) To reach P, the light waves from S1 S 1 and S2 S 2 must travel different distances. The terms ‘total float’ and ‘free finish time’ are useful terminology for assessing the progress of construction work, the difference of these two terms is: A) duration B) null float C) interfering float D) critical activity duration 2. Interfering float: It is similar to head event slack. A project’s total float is the difference between the finish date of the last task on the critical path and the project completion date. (@_ Interference float ~ Independent float — Free float 15. 3 represents a portion of an arrow network. Critical activity is an activity with zero or negative float. Calculate the total, free, and interfering float of activity 20 ? Please show work . • Interfering float = total float – free float . Expert Answer. Perpetual Income 365. 17. On the arrow network diagram below, compute the early and late event times ( TE and TL) for each node and the four floats (the total float, free float, and interfering float) for each activity. Using the AOA and AON diagram, (i) identify the critical path, and (ii) calculate the total float, free float, interfering float, and independent float for. the critical path. You can complete the project on time by using the remaining project float. It is the part of the total float that remains after free float is deducted. In our case, Total Float = (duration of path D-E-H) – (duration of path D-G-H) = 17 – 15 = 2 Days. Calculate the total float, free float, and interfering float for each activity. In this video, you will learn the basic fundamentals of interfering and free float of an activity on a project. 5 5 3 8 10 1 11 1 / 3 5 / 7 7 / 10 10 I 11 Plant hedge plants 3 7 10 3 10 Note: Interfering float: shared by multiple activities; "shared. Study ResourcesActivity Floats Professor Odeh introduces the types of floats in a construction project including; total float, free float, interfering float and independent float. activities in the network. This video includes explanation and calculation of interfering float. e. 8. Interfering float; Free float Total flat; Answer :Free float Construction Management MCQ Practice Questions (Civil Eng) Set 2. Independent float: It is the minimum excess available time which exists without affecting any of succeeding or preceding activities. Total float 103. Total float is the sum of free float and interfering float. In project scheduling, the free float (slack) of an activity represents the leeway for scheduling the activity without affecting any subsequent activity. Edit: a local pilot has actually crashed in the cove in the past (without injuries) and voluntarily gave up their license. Free float 3) Independent float 4) interfering float So, I think option (c) is correct. (a) Compute the relevant information and include the information on the figure, and complete the following table: Early Finish Late Finish Free Float Total Float Finish grade Gravel roadway Compact road Set entry gate b) The critical activities are: c). The critical path is a single path that defines the duration of the project. This answer was edited. Question: 0401 437 12. 4. Using the AOA and AON diagram, (i) identify the critical path, and (ii) calculate the total float, free float, interfering float, and independent float for each activity. Where, T L j = T he Latest expected time for event j, T E j = The Earliest allowable time for event j. RELATED LINKS. TOTAL FLOAT = ( LFT – EFT ) or ( LST – EST ) • FREE FLOAT: Free Float is the time by which the completion of an activity can be delayed the EFT without affecting the EST of succeeding activity. What is the project duration? (3 points) What are the critical activities? (4 points) This problem has been solved! You'll get a detailed solution from a subject matter expert that helps you learn core concepts. Once the free float has been used (or if it is zero), the interfering float tells us by how much the activity may be delayed without delaying the project end date - even though it will delay the start of subsequent activities. delaying the entire project but causing delay to the . Using these formulae the values are calculated and tabulated in the table. Free float: The delay can be made without delaying succeeding activities. interfering float 4. 414 hours ago · Civil Engineering. (2 points) Buy plants and paint Repair board fence Paint board fence Cleanup sidewalk 1 2 3 3 2. 29K views 10 months ago OPERATIONS RESEARCH. For identifying the critical path, the following condition are checked. number of origins are less than the number of destinations. #totalfloat #freefloat #independentfloat #float #cpm #operationsresearch. It is the difference between the latest finish time of the activity in question and the earliest start time of the following activity or zero, whichever is larger. Interfering float = Total float – Free float Explanation The given relationship "Interfering float = Total float – Free float" is incorrect because interfering float is a separate concept and is not equal to the difference between total float and free float. The path. Independent Float: It is the minimum excess available time which exists without affecting any of succeeding or preceding activities. 6. Pick up the correct statement from the following: (A) The duration between the earliest start time of the preceding event and latest finish time of the succeeding event, is called 'float' (B) The duration of time by which an activity can be delayed without affecting the succeeding activity, is called free float (C) The difference between total. The horizontal survival float is the most energy efficient floating position, and is used when the swimmer anticipates being in open water for an extended time ; Vertical Survival Float ;Interfering float is the difference between. Start calculations with day zero. Although they are calculated for each activity, they serve entirely different purpose. Highlight the critical path. Interfering float . This is the ‘free float’ used for resource levelling on the ‘back pass’. Float adalah hal yang harus diperhatikan saat membuat penjadwalan proyek konstruksi, karena kalau seorang manajer proyek kehilangan angka float, maka akan berakibat fatal yakni bertambahnya durasi proyek. FF, and TF for the activities. B. It is computed for an activity by subtracting the tail event slack from its total float. Start calculations with day zero. Free float, on the other hand, refers to the amount of time a. FIN = FT - FF = Sj ( Statement 1 is correct) Where, F T is Total. We would like to show you a description here but the site won’t allow us. Q 11. This is quite commonly used, particularly in association with the free float. i, iii, iv d. Show the potential critical activities on the bar chart and critical paths for the AOA and AON networks. You have also determined that the three succeeding activities have early starts of 7, 9, 12. Pick up the correct statement from the following: A. 709K views 8 years ago Engineer4Free 368K views 8 years ago Project Management:. Amount of time a project can be delayed without impacting an imposed deadline. Advertisements. On the network diagrams calculate and show the early start (ES), early finish (EF), last start (LS), late finish (LF), and total float (TF) for each activity using network-specific notation. It does not affect the start of succeeding activity i. The sequence of critical activities in. answered Feb 23, 2022 by Kartikpandey (35. Civil Engineering questions and answers. 1. Float, Free Float, Independent Float and Interfering Float. It is the difference between the total float and the free float of an activity. A critical path is an activity or event that, if delayed, will delay project completion. subsequent tasks (“free float”). Defaults to 0. Professor Odeh introduces the types of floats in a construction project including; total float, free float, interfering float and independent float. P. This is obtained as follows: F I. Interfering Float: It is similar to head event slack. 2. Important Points. Show info about module content. See Correct Answer. Calculate the total float, free float, and interfering float for each activity. This is naturally equal to the earliest event time associated with the. [A] Total float and independent float[B] Total float and free float[C] Free float and independent float[D] Independent float and free float Answer: Option B. 3 From the following network data, determine the critical path, starting and finishing times, and total and free floats. INSE 6230 – Winter 2018 3 Assignment 1 D will be delayed instantly and F will be delayed for the same amount consequently. Free Float for i-j F F = T j E - (T i E + t ij) Interfering Float (F IT): It is defined as the difference between the total float and the free float of an activity. Now we see how to customize MME effects. 31) shows that in order to calculate the total float, it is necessary to carry out the forward and backward pass. FF=EST Of its following activity—its Erl' (Xiii) Interfering Float It is the difference between the total float and the free float. Float or slack is the amount of time that a task in a project network can be delayed without causing a delay to subsequent tasks ("free float") and project completion date ("total. More simply, the range an activity can move around without affecting the end date of the project. Calculate the total, free, and interfering float for the following problem d. interfering (shared) float d. Understanding Work Dates and Calendar Dates In this module, the difference between working dates and calendar dates is explained and how to chart both in a project plan. Question: For questions 3 and 4 , do the following. Total Float and Free Float are used in Critical Path Method (CPM) to determine schedule flexibility of an. Interfering Float (F I T): ∙ It is defined as the difference between the total float and free float of an activity. earliest event time for event j - latest event time for event i - duration of activity. Total Float: The total amount of time that a schedule activity may be delayed from its early start date without delaying the project finish date, or violating a schedule constraint. There is a certain amount of time the project as a whole can be delayed before missing a critical deadline. Identify all potential critical activities on the bar chart. 10 represents the activities for constructing a culvert. expected conditions, can O d. This Question Belongs to Civil Engineering >>. Question: Q. Interfering float is the difference between. Between total float, interference float, and independent float, which one of the following is the correct sequence in the decreasing magnitude order? Q. Duration O b. Thus, the critical path of the project is A-C-F-H. 19. It is the path with the greatest total. Highlight the critical path. Exercise 6. No. For example, if you know a task will take six days to complete, but you’ve. 5 IN the critical path Method of project planning, free float can be (B) (C) (D) Greater than independent float Greater than total float Less than independent float Equal to total float . Total Float or Float 2. Free Float = ES of next Activity – EF of Current Activity. Ans. The free float of activity I is 13. The float calculations for the sample schedule are shown in Exhibit 5. c) Interference float The difference between total float and free float. (1) Construct the AON networks and compute the ES, EF, LS and LF times. 6 Critical path moves along the activities having total float as (A) (B) (C)Types of Floats. a) Construct an activity network for the preceedance tables. It is the part of the total float that remains after free float is deducted. 시방서의 종류 및 포함되어야 할 주요사항. (b) Free float (c) Independent float (d) Interfering float. Any delay in an activity on this path will delay whole project • Float is the measure of how much the start or completion of an activity may be Interfering Float: (F IN) The maximum amount by which an activity can be delayed without delaying the project but will cause delay to the Early Start of some following activity. Used to help create valid threaded objects where the thread must fuse with. Determine the Interfering Float of Activity i-j. The Interfering float of activity C is 15. c ) portion of interfering float. The network for this precedence table H(6) F(1) G(1) D(1) C(2) B(1) E(3) A(4) Disclaimer: Every effort has gone into ensuring the accuracy of this document. Free float: The time span by which delay can be made without delaying the succeeding activities. Float for the fourth path = 31 – 13 = 18 days. 2. Don’t forget to check out the video. Calculate the lag values for the activities: Lag value=. The total float shown in Table 6. 1057/palgrave. interfering float Click the card to flip 👆 The time span in which the completion of an activity may occur and not delay termination of the project, but within which completion will delay the start of some following activity. d ) none of the above. 3. Adarsha said: 6 years ago. FF FF: Free Float ES EF INTF : Interfering Float TF: Total Float INDF : Independent Float ES: Early Start Activity Name EF: Early Finish Planning School LS: Late Start LF: Late Finish. Once the free float has been used (or if it is zero), the interfering float tells us by how much the activity may be delayed without delaying the project end date;The total float of an activity can be classified into free float, independent float, and interfering float. Hence the correct answer. Delaying past the INFT can impact the project's timelines. Interesting explanation of the types of schedule float. CPM (1) Construct the AON, AOA networks and compute the ES, EF, LS and LF times. A critical path is an activity or event that, if delayed, will delay project completion. Show transcribed image text. Using the AOA and AON diagram, (i) identify the critical path, and (ii) calculate the total float, free float, interfering float, and independent float for each. Interfering float is given by \({F_{INT}} = {F_T} - {F_F}\) = S j Independent float is the time by which starting or finishing of an activity can be delayed without affecting the total float of its proceeding and succeeding activity. following activity. Solve the arrow diagram network shown below. Interfering Float (INTF) Independent Float (INDF) What are the two types of floating? Horizontal Survival Float. Interfering float is that part of the total float which causes areduction in the float of the successor activities. Compute the values of ES, EF, LS, LF, FF, and TF for the activities. Correct Answer - Option 3 : Independent float Concept:. Topics covered in playlist of PERT AND CPM: Network Techniques, Project, CPM, PERT, Common terms used in Arrow. Free Float: The amount of time that a schedule activity can be delayed without delaying the early start date. See Correct Answer. 9. The INFT formula is: Interfering float = (total float) - (free float) Independent float. . However, the FM Network can accept no responsibi. Interfering Float: It is similar to head event slack. Independent float F I D: It is defined as the amount of time by which an activity can be delayed without affecting the succeeding activity and preceding activity. Interfering Float (INTF) Interfering Float is the amount of time a schedule activity can be delayed or extended from its early start date without delaying the project finish date. critical float. 3. It is also equal to the slack of head event of head activity as shown below; F IT = F T - F F. Expert-verified. . Days = From Question 3 ) ES = ES of Tail or Tail event of Activity 4 ) EF = ES + Duration 5 ) LF = LF of Head or Head Event of Activity 6 ) LS = LF - Duration 7 ) Total Float = LS – ES OR LF – EF 8 ) Interfering Float = Slack of Head Event or Total Float – Free Float 9 ) Free Float = TF - Interfering Float or TF – Slack of Head Event 10 ) Independent Float = FF. Float Calculation Event Oriented Here Activities are shown as i-j, where i is tail event & j is head event e. and independent float (IF) for each activity in a tabula' form lot the AOA and a separate table for AON. Independent float is that portion of the total float within which an activity can be delayed for start without affecting the float of the preceding activities. It is the difference between the latest finish time of the activity in. free float = total float – head event slack. Activity float is a measure which calculates the difference between the activity’s earliest start date and the latest start date. Understanding Work Dates and Calendar Dates In this module, the difference between working dates and calendar dates is explained and how to chart both in a project plan. The different types of floatare 1. Float or slack is the amount of time that a task in a project network can be delayed without causing a delay to subsequent tasks ("free float") and project completion date ("total float"). In the context of activity-on-arrow (AOA) network representation, textbooks on project management, based on our survey, have for decades been using a popular formula to calculate free floats that. total float c. Hence the correct answer. Set up the ES, EF, LS, LF, TF, FF, and interfering float (IF) table and indicate the critical path. Total Float: The total amount of time that a schedule activity may be delayed from its early start date without delaying the project finish date, or violating a schedule constraint. Free float : The delay can be made without delaying succeeding activities. Interfering float (INTF) INTF refers to the time you can delay a task from the date you planned to start it without delaying the project's completion date. INTF is defined as the time span in which the completion of an activity may occur and not delay the termination of the project but within which the completion will delay the start of some other following activity . Operating System Structure Float / Slack Total Float : The total time that a schedule activity may be delayed Total Float = ( LFT – EFT ) or ( LST-EST) Free Float : Free Float is the time by which the completion of an activity can be delayed beyond the EFT without affecting the EST of succeeding activity Free Float = EST (succeeding) – EFT. e. This will tell you how much total time the critical tasks can be delayed before the. Float can “make or break” the project control process, claims, and overall project success. During PMP® coaching sessions, I observe […] Interfering Float (INTF): The amount of time that a schedule activity can be delayed or extended from its early start date without delaying the project finish date, but delaying an activity into interfering float will delay the start of one or more following non-critical activities. The time by which a particular activity can be delayed without affecting the preceding and succeeding activities is known as a) Total float b) Free float c) Interfering float d) Independent float. A small project, consists of seven activities in the activity-on-node diagram as shown in the figure below. Early activity finish. It only affects concerned activity. Utilization of the float of an. TFi = LSi - ESi TFi = LFi - EFi. Free Float (FF) = the maximum amount of time an activity can. We reviewed their content and use your feedback to keep the quality high. Interfering Float (IF): The total time utilized in the current activity that interferes with its following activities; Independent Float (Ind. Each row of Fig. Learn more. Late Date – Early Date = Total Float. as that. How long is the project duration? Successor(s) Duration APTER Act. So, A float (or slack) in a critical path method (CPM) is the amount of time that a task can be delayed without causing any delay to Subsequent tasks and. Free Float. Thus, independent float can be calculated as under: Independent Float = Total. (Sam) Woodgate 5 . Pick the wrong relationship: A. Total Float is. Compute the free float of activity J. Interfering Float INTF is defined as the time span in which the completion of an activity may occur and not delay the termination of the project but within which the completion will delay the. It is the chain of stages formative the least time needed for an. Free float is how long an activity can be delayed without delaying the Early Start of its successor. Total Float of an activity = Late Finish of an activity – Early Finish of an activity. However in the Gantt (bar) chart it further indicates the type of float. Update is the process of revising activity data to incorporate actual progress. Free Float Late (FFL) – the ICL Alternative Figure 2 The representation of FFL used in Figure 1 is based on the published work of H. 2 weeks B. 9. Activities that have strict start and end times are considered to be critical. Interfering float= LFT(present)- EST(succeeding)This problem has been solved! You'll get a detailed solution from a subject matter expert that helps you learn core concepts. An activity with a float value to be zero is called critical because delay in carrying out the activity will affect the project. 건설산업에서의 IPD(Integranted Project Delivery) 9. This problem has been solved! You'll get a detailed solution from a subject matter expert that helps you learn core concepts. If the float is positive and the activity is delayed by a period equal to its total float, the completion of project is not delayed; The float may be positive, zero or negative. Critical path lies along the activities having total. F = T E j − T L i − t i j = F F − S i. E (Value Engineering) 6. 10 represents the activities for constructing a culvert. It affects only preceding activity. Interfering float The diff between the total float and free float Reducing Project Duration Time Is Money: Cost-Time Tradeoffs – Reducing the time of a critical activity usually incurs additional direct costs. In other words, going past this allotted time will interfere. Float which can be "used up" without affecting other tasks is known as "Free Float", float which will affect the timing of other tasks is known as "Interfering Float". (3) Compute the total float (TF), free float (FF), interfering float (IF), and independent float (IDF) for each activity. following activity. Intermittent float 106. Interfering float. It is the difference between the latest finish time of the activity in question and the earliest starting time of the following activity or zero, whichever is larger. (b) Calculate the event times (earliest start times and latest start times), andhence find the critical path. Project management float refers to the amount of time that you can delay a task without impacting other parts of a project's timeline or missing the overall completion deadline. Determine if these are differences in float values between the AOA method and the AON method and why. View Answer. 1 Approved Answer. Interfering Float (INTF): The amount of time that a schedule activity can be delayed or extended from its early start date without delaying the project finish date, but delaying an activity into interfering float will delay the start of one or more following non-critical activities. Free float: The delay can be made without delaying succeeding activities. ALL ABOUT CRITICAL PATH METHOD (CPM)MANAGEMENTMANAGEMENT: FAQs- LOUNGI. D S В. Interfering float: It is similar to head event slack. Powerpoint Pro V2 Presentation Maker. The critical path is the sequence of critical activities. Total float Interfering float Independent float Free float . Interference Float (IntF) or Shared Float (SF) 8. critical float. Using the AOA and AON diagram, (i) identify the critical path, and (ii) calculate the total float, free float, interfering float, and independent float for each. In other. Independent Float: It is the minimum excess available time which exists without affecting any of succeeding or preceding activities. md k answered on October 15, 2022. Identify the critical path. It is given by Total float - Free float. Ask Question Asked 3 years, 8 months ago. interfering (shared) float d. F. An activity can be delayed by an amount up to its independent float without delaying the start of any other activity. Where, F T is Total Float, F F is Free float In construction project, float or slack is the amount of time that a task in a project network can be delayed without causing a delay to: 1. Q. Total Float (TF) = Total Slack = LF – EF = LS – ES = LF – ES – d Another type of float often used in network analysis is the Free Float, which can be calculated as: Free Float = Es (of succeeding activity) – EF (of activity in question) The free float defines the amount of time that an activity can be delayed without taking float away. Interfering Float: (F IN) The maximum amount by which an activity can be delayed without delaying the project but will cause delay to the Early Start of some following activity. 2 weclivity Cis E, 4 week 3 weeks wcks D-3 weeks B. Interfering Float ( INTF ) Interfering Float is the amount of time a schedule activity can be delayed or extended from its early start date without delaying the project finish date . Network 공정표에서의 간섭여유(Dependent Float or Interfering Float) 3. A machine is purchased for Rs. (d) Give a. Code: 57826 6 • Hammock activities are activities which have zero duration and to start at the same time as the first hammocked activity. Also compute the free float (FF), interfering float (IF), and independent float (IF) for each activity in a tabular form for the AON. This ensures that the float behaves. Formulas for calculating Total Float and Free Float are as follows: Total Float = LS – ES (it is also calculated by LF – EF)Free Float = Lowest ES of successors – EF. use of float to improve efficiency. which. (d) Interfering float: Maximum amount by which an activity can be delayed without delaying the project but will cause delay to the early start of some following activity; It is similar to head event slack. Download Solution PDF. Updated February 3, 2023 Developing an accurate project schedule and tracking your team's progress is important for ensuring clients and customers receive the finished. Activity Name Task Time (hrs) Preceding Activities A Clear Garden 4 B Measure area 1 C Design Patio 2 B D Purchase fencing 1 B E Buy pots and plants 3 A,CFor an activity with a single predecessor and a single successor, calculating interfering float of an activity requires: Successor's ES, Predecessor's EF, and Activity's TF. It affects only preceding activity. It is denoted as FF. (b) How much of that total float is interfering float? During scheduling for a project, you determine Activity E to have an early finish of 7 days (EF=7) and the late finish of 9 days (LF=9). 5 Define Free Float, Independent float, Interfering float as used in PERT chart. 3. • Interfering float: the difference between total float and free float. Question: For the arrow network information provided below, without drawing a network diagram, calculate the early start and finish dates, the late start and finish dates, the total float, free float, interfering float, and the independent float. Added an answer on October 7, 2020 at 8:00 pm. Free float is mainly used to. Thus, using the lag values calculate the free and the total float of the network. It tells us by how long the activity's start or completion may be delayed without. The early start time for the first activity of any network is day _____. Expert Answer. It is computed for an activity by. When leveraged properly, project managers can shift activities and resources to meet the project objectives and priorities. A. Download Solution PDF. PMBOK Guide definitions of Total Float and Free Float. If negative, evaluate as "0". Consider the activities shown in table below. The float may be positive, zero or negative. 1) (3. Question: 6. ALL ABOUT CRITICAL PATH METHOD (CPM)…Total Float and Free Float are very different concepts. Who owns the float? 111. That means, we can get. Freefloat : Portion of the total float within which an activity can be manipulated without affecting the floats of subsequent activities. Exhibit 5. Whereas free and total float are about the time an activity can be delayed, project float is the time of delay based on imposed deadlines. When all the paths are arranged. Highlight the critical path. F IN = F T - F F = S j. Interfering Float: (F IN) The maximum amount by which an activity can be delayed without delaying the project but will cause delay to the Early Start of some following activity. Terminology : An activity : is a task which needs to be done and takes an :. 22. unexpected conditions, cannot O b. Interfering Float = Total Float – Free Float Independent Float (INDF) Interfering Float is the maximum amount of time an activity can be delayed without delaying the early start of the succeeding activities and without being affected by the allowable delay of any predecessor activity. Q16. Draw a logic diagram b. Any delay in an activity on the critical path. In other words,. 3. 3 Float Calculation – Summary Following Activities Completed Early Late Preceding Activities Completed Early Free Float (FF) Total Float (TF) Late Independent Float (IndF) Safety Float (SF) 43 • Interfering Float (IF) = Total Float (TF) – Free Float (FF)2. RELATED LINKS. Or: The time-grid diagram including the. In other words, suppose you have a project to. Set up the ES, EF, LS, LF, TF, FF, and interfering float (IF) table and indicate the critical path. Who are the experts?Also compute the free float (FE1, interfering float f IFE and independent float (IF I for each actin it) in a tabular form fix the AOA and a separate table for AON. However, it should be understood that delaying an activity. Float and Free Float is one of the sources to make such adjustments. This is the final answer key and the exam for the same was conducted on 18th August. Expert Answer. Pada kesempatan kali ini, How To Tekno khusus membahas tipe data Float. Interfering Float: Maximum amount by which an activity can be delayed without delaying the project but will cause delay to the Early Start of some following activity. An interfering person gets involved in other people's lives in an unwanted and annoying way: 2…. identify the activities which can be delayed without affecting the total float of the preceding activity. 3 F4 week D. O week B. total float =free float + independent float. 4 Independent Float (INDF) The maximum amount of time an activity can be delayed without delaying the early start of the succeeding activities. Who are the experts? Experts have been vetted by Chegg as specialists in this subject. Negative float, also known as negative slack, is the amount of time beyond aproject's. Also, determine (show calculations) the independent float and interfering float for Activity K. Komal Bhandakkar AUTHOR. Also compute the free float (FF). Draw the bar chart, AOA, and AON network diagrams for the following project. L. 2. b) Free float It is defined by assuming that all the activities start as early as possible. total float and free float . pitch (float) – Length of 360° of thread rotation. But with the interfering float, Framing is now delayed and can't start until Day 19. Engineering; Civil Engineering; Civil Engineering questions and answers; FS-3 FF-2 B A Start 0 6 8 SS-1 SS-2 E Finish SFS 5 0 с D 2 Given the above network, which of the following best describes Activity E: Activity E has 1 day of total float Activity E has 1 day of interfering float Activity E has 1 day of free float Activity E is on the critical path2. Civil Engineering. interfering Float is the maximum amount of time an activity may be delayed without delaying the entire project but causing a delay to the succeeding activities. Thus, an independent float can be calculated as under: Independent Float = Total Float – Tail Event Slack.