Development of a Master CPM Network
Breakdown a project into major divisions (Project breakdown structure)
List tasks or activities in each division
Assign activity durations
Assign activity resources
Develop sub-network for each division
Define logical relationships connecting sub-networks and activities
List activities and their related information in tabular format
Generate schedule for each management level
Type of CPM Network

Arrow Diagramming Method (ADM)

Convention
Arrow: Activity (Activity Description)
Event: Beginning Event
Ending Event
Event Number (representing activity)
Duration
Logical Relationship (understanding the nature of ADM): Constrains or restraints
Dummy Activity
Rules:
No Activity will be have the same event numbers
No loop
Precedence Diagramming Method (PDM)
Convention
Event: Activity (Activity Description)
Arrow: Logical Relationships (technological managerial, and external)
Finish-to-Start
Start-to-Start
Finish-to-Finish
Start-to-Finish
Activity Number
Duration
Lag
Rules:
No Activity will be have the same activity numbers
No loop
Arrow Diagramming Method (ADM)

Schedule Computation
Early Dates: Early start and early finish (event and activity)
Late Dates: Late start and late finish (event and activity)
Free Float
Total Float
Critical and Near Critical Activity
Critical and Near Critical Path
Critical Factor
Recommendations
The event number should be assigned from left to right and top to bottom.
The event number should have an interval so that more activities can be added.
A project network should have one start and finish event.
Precedence Diagramming Method (PDM)

Schedule Computation
Early Dates: Early start and early finish (event and activity)
Late Dates: Late start and late finish (event and activity)
Free Float
Total Float
Critical and Near Critical Activity
Critical and Near Critical Path
Critical Factor

Structural work
1.1 foundation
Piling
Excavation
Footing formwork setting
Footing rebars
Footing concrete
Footing formwork removal
1.2 grade beam (gb)
Gb formwork setting
Gb rebars
Gb concrete
Gb formwork removal
Resource: any consumable, except time, required to accomplish and activity such as labor, materials, equipment, machinery, tools, etc.
Priority/ Importance (Pareto’s Law)
Stockability
Required/ Availability Resource Intensity
Uniform Requirement
Non-Uniform Requirement
Resource Complexity
Resource Aggregation
Resource Aggregation Process:
Develop CPM network
Define resources to be planned and controlled
Assign resource quantity for each activity
Perform time computation or activity scheduling
Develop resource histograms and cumulative profiles based on activity schedule
Resource Leveling
Limited Resource Leveling/ Allocation
Milestone
An event that is of major significant in achieving the program or project objectives
Milestone Scope: Based on project breakdown structure desired level of control
Milestone Schedule Ownership:
Developed by the “OWNER”
Incorporated in Bidding Documents
Types of imposed milestone dates

1. Not Later Than Date

2. Not Later Than Date

3. Not Later & Not Earlier Than Date
(Absolute Require Date)
The Work Package (W.P)
The unit of PBS at the lowest developed level
The work to be performed by a single organizational unit
The base for contractor estimate
The base for short interval schedule
Can be represented by an activities in CPM schedule
A: A Not-Later-Than-Imposed Date which is greater than Late Computed finish does not affect computed date for any milestones or activities in the network
B: A Not-Later-Than-Imposed Date which is earlier than a computed Late Finish will be considered in backward pass computation, and will reduce the float of the predecessor milestones and activities
This is a date which places a late limit on the milestone occurrence, but does not restraint it to occur earlier
A: A Not-Earlier-Than-Imposed Date which is earlier than the computed Early Start does not affect the following milestones or activities.
B: A Not-Earlier-Than-Imposed Date which is later than computed Early Start will be considered for forward pass computation, and will reduce the total float of the following milestones or activities
This is a date which places a early limit on the milestone occurrence, but does not restraint it to occur Later
A: An Absolute date can have a tremendous impact on schedule of either predecessor or successor activities, if it is not selected properly.
Only if the imposed date is equal to the late computed milestone time, will the date have no impact for a given “Time Now”
This is a date which requires the milestone occur precisely at a specific date
Float Factor (Quantitative Index)
The total number of float days for all activities in progress or not started divided by total activities duration (remaining or not started)

Critical Index (Quantitative Index
At a given time now, the ratio between the number of critical activities and the total number of activities in progress or not started
If Specific by owner, should be based on a CPM Master Network, and attached to the invitation to bid
Dates should reflect computed late finish dates to conserve the float for project utilization
For each system, only one milestone released to start-up procedure is adequate