Direct Cost
Anything that associated w/ discreet physical part of project
Ex. labor, material, equipment
Indirect Cost
Anything that can’t be associated w/ discreet physical part of project
Ex. Utilities, overhead expenses, salaries
Total Float (TF)
Max. delay of ES without affecting the overall project duration
Free Float (FF)
Max. delay of ES without affecting ES of any succeeding acitivity
Interfering Float (IF)
Delay of acitivity’s ES in the preceeding activity used up
Critical Path (CP)
- Path w/ the longest duration
- Defines project duration
Logical Limit
of days to reduce before creating another critical path
Physical Limit
Most # of days to reduce as possible
Work breakdown structure (WBS)
Identify specific activities of work required
Non-network schedule
Gantt Chart
- hard to show effects of delays and changes
Network Schedule
- CPM (Critical Path Method)
- ex. AOA / AON - PERT (Program Evaluation and Review Technique)
AOA diagrams
- Arrow = Activities
- Node = Points in time
- Dummy arrows
AON diagrams
- Arrow = Relationship v activities
- Node = Activities
Why level resources?
- to complete project w/ available resources
- to avoid crew over allocation + conflict
Why crash schedule?
- save time and money
- make up time on project
Cost slope formula
(Crash cost - Direct cost) / Crash duration
Early Start (ES)
Lastest EF of all IPA
Early Finish (EF)
ES + Dur
Late Start (LS)
LF - Dur
Late Finish (LF)
Earliest LS of succeding activity
Steps of schedule crashing
- Forward/Backward pass
- Find CP and Critical activities
- Find next longest path
- Find critical activity w/ the lowest cost slope
- Find logical/physical limit
- Crash schedule
- Recalculate forward/backward pass
- Find indirect/direct/total cost
What are the steps of resource leveling on MS project
- Assign available resources/resource limit
- Level resources within available slack
- If not, level resources outside available slack
When levelling resources, which activities have priority?
Activities w/ the earliest LS
Steps of manual resource leveling
- Assume there’s no labour limit and calculate project dur.
- Determine max. required resource
- Find LS
- Find resource limit and make resource levelling table
