1. By: Ernawati Mustafa Kamal School of Housing, Building & Planning Universiti Sains Malaysia

2.  A project is a collection of tasks that must be completed within certain time frame, with specific cost & quality.

3.  Estimating time of project by determining the earliest start and finish of each activity.  Finding the minimum cost schedule needed to complete the project by a certain date.  Investigating the results of possible delays in activity’s completion time.

4.  Progress control.  Smoothing out resource allocation over the duration of the project.

5.  Tasks are called “activities.” - Estimated completion time (and sometimes costs) are associated with each activity. - Activity completion time is related to the amount of resources committed to it. - The degree of activity details depends on the application and how specific is the data.

6.  To determine optimal schedules we need to ◦ Identify all the project’s activities. ◦ Determine the precedence relations among activities.

7.  Example: - Company A is a contractor & they need to construct a house.

8.  Major task they need to perform & complete: - Sub-structure - Superstructure - Internal Finishes - Services and finishing - External Works

9.  Company A needs to develop a precedence relations chart.  The chart gives a concise set of tasks and their immediate predecessors.

10. ActivityDescription APiling Sub-StructureBPile caps and ground beams ActivityDescription APiling Sub-StructureBPile caps and ground beams CFrame DUpper Floors ERoof FStairs and Ramps SuperstructureGExternal Walls HWindows and External Doors IInternal Walls and Partitions JInternal Doors CFrame DUpper Floors ERoof FStairs and Ramps SuperstructureGExternal Walls HWindows and External Doors IInternal Walls and Partitions JInternal Doors Internal FinishesKWall finishes LFloor Finishes M Ceiling Finishes Internal FinishesKWall finishes LFloor Finishes M Ceiling Finishes

11. ActivityDescription NSanitary installation Services & FinishingOWater installation PElectrical installation ActivityDescription NSanitary installation Services & FinishingOWater installation PElectrical installation QRoad, Paths, Pavings & Surfacing External WorksRLandscaping and Irrigation Systems SFencing TExternal drainage UExternal services QRoad, Paths, Pavings & Surfacing External WorksRLandscaping and Irrigation Systems SFencing TExternal drainage UExternal services From the activity description chart, we can determine immediate predecessors for each activity.

12.  Mathematical Analysis - calculating theoretical early and late start and finish dates for all projects activities without regard for any resource limitations. - The resulting dates are not schedule, but it indicate the time period within which activity should be schedule.

13.  Critical Path Method (CPM)  Graphical Evaluation and Review Techniques (GERT)  Program Evaluation and Review Technique (PERT)

14.  Bar Charts - Milestone charts - Gantt charts  Horizontal time scale is used, often divided into weeks.  Various operations comprising the project are listed vertically down the left-hand side.

15.  The timing and duration of each operation indicated by a horizontal bar spanning the relevant period of weeks and shown on the same line as the operation it refers to.