Successfully reported this slideshow. 83, 862 views Dec. 04, 2016 (AOA) and (AON) Network Construction and Critical Path Determination (Aoa) and (aon) networks 1. Project Management Dr. Mahmoud Abbas Mahmoud Asst. Prof. 2016 - 2017 Activity on Arrow (AOA) and Activity on Node (AON) Networks 1 2. Identify for Each Activity: • Which other activities must be completed previously (predecessors)? • How long time required for completion? • What are the required resources? 2 3. Project Scheduling Commonly used techniques: • Gantt Chart • Critical Path Method (CPM) • Program Evaluation and Review Technique (PERT) 3 4. Drawing the Project Network • AOA – Activity on Arrow: networks show each activity as an arrow, and the nodes represent the starting and ending points • AON – Activity on Node: networks show each activity as a node and arrows show the immediate predecessor activities 4 5. A Comparison of AON and AOA Network Conventions Activity on Activity Activity on Node (AON) Meaning Arrow (AOA) A comes before B, which comes before C (i) A B C BA C A and B must both be completed before C can start (ii) A C B B and C cannot begin until A is completed (iii) 5 6.
This page compares PDM method vs AOA method and mentions difference between PDM(Precedence Diagram Method) and AOA(Activity On Arrow) network diagram methods. Both PDM and AOA are used in project schedule or time planning. There are two types of network diagrams. • Activity on Arrow diagram or AOA or Arrow Diagram • Activity on Node diagram or Precedence diagram method(PDM) As mentioned in the figure-1, CPM/CPA(Critical PAth Method/Critical Path Analysis) and PERT(Program Evaluation and Review Technique) fall under Arror network Diagram. PDM falls under Activity Network diagram or AON. PDM-Precedance Diagram Method As mentioned in fig-2 in PDM or Precedence Diagram Method nodes or boxes are used to represent activities. Arrows show activity dependencies as depicted. There are four types of dependencies between the activities. ➨ Finish to Start:An activity must finish before the successor activity can start. ➨ Start to Start:An activity must start before the successor activity can start ➨ Finish to Finish:An activity must finish before the successor activity can finish ➨ Start to Finish:An activity must start before the successor activity can type is rarely used.
Network Diagram for Activity On Node (AON) and Activity On Arrow (AOA) Technique. - YouTube
Related: critical path, start and finish times, PERT, activity-on-node diagram
What is an AoA diagram? - Quora
Latest Start Time Rule: The latest start time (LS) of an activity is the difference of its latest finish time (LF) LS = LF – Activity time 30. LS / LF Calculations LF = EF of Project 31. 13 15 32. 33. 10 13 84 34. 4 8 LF = Min(4, 10) 42 35. 41 00 36. Computing Slack Time After computing the ES, EF, LS, and LF times for all activities, compute the slack or free time for each activity Slack is the length of time an activity can be delayed without delaying the entire Slack = LS – ES or Slack = LF – EF 37. Earliest Earliest Latest Latest On Start Finish Start Finish Slack = Critical Activity ES EF LS LF (LS – ES) = (LF – EF) Path A 0 2 0 2 0 Yes B 0 3 1 4 1 No C 2 4 2 4 0 Yes D 3 7 4 8 1 No E 4 8 4 8 0 Yes F 4 7 10 13 6 No G 8 13 8 13 0 Yes H 13 15 13 15 0 Yes 38. Critical Path 39. A – C – E – G – H Completion Time = 15 weeks 40. Dr. Mahmoud Al-Naimi
No activity can start until its tail event is realised. 8 Merge and burst nodes Merge nodes: Burst nodes: Events into which a number of activities enter and one (or several) leave. Burst nodes: Events that have one (or more) entering activities generating a number of emerging activities. 9 Two typical errors in logic Looping: underlying logic must be at fault Dangling: an activity is undertaken with no result 5 6 7 e f g 2 4 5 end a c d 1 start 3 b 10 Interfacing When an event is common to two or more subnetworks it is said to be an 'interface' event between those subnetworks and is represented by a pair of concentric circles. 11 13 aa ac ab 21 ba 24 bc bb bd 12 22 11 Milestones Events which have been identified as being of particular importance in the progress of the project. Identified by an inverted triangle over the event node (occasionally with an imposed time for the event) 1/1/2014 1 2 3 a b 12 Multiple starts and finishes Only used in computer programs All starting activities can occur at the start and all finish activities will occur at the end of the project.
AON can accommodate any types of relationship ( Finish to Start, Finish to Finish, Start to Start, Start to finish, Lead and Lag) AON is widely as it is supported by almost all the project management software tools
View the network diagram and task schedule table to examine the critical path and float or slack for each activity. Print the Gantt chart and network diagram views and the task schedule table to include in your Word Document. Write at least a paragraph that interprets this information for someone unfamiliar with project time management. Solution: MS Project Practice: AOA network diagram NOT RATED Purchase the answer to view it