Master Schedule vs Construction Timeline
Both are used for planning a construction project, but they serve different purposes.
| Item | Master Schedule | Construction Timeline |
|---|---|---|
| Purpose | Complete project management plan | Visual summary of key project dates |
| Detail Level | Very detailed | High-level overview |
| Contains | All tasks, durations, logic links, resources, milestones | Major phases and milestones only |
| Users | Project Manager, Site Engineer, Scheduler | Client, Owner, Management Team |
| Software | Usually in Microsoft Project or Primavera P6 | Timeline view in scheduling software or presentation |
| Updates | Daily or weekly | Weekly or monthly |
| Size | Hundreds or thousands of activities | 10–30 major activities |
1. Master Schedule
The Master Schedule is the full project schedule.
It contains:
WBS (Work Breakdown Structure)
Activity IDs
Task names
Durations
Start dates
Finish dates
Predecessors
Successors
Resources
Critical Path
Milestones
Example
Foundation
Site Clearing
Excavation
Footing Reinforcement
Concrete Pouring
Structure
Columns
Beams
Slabs
Finishes
Plaster
Painting
Ceiling
Flooring
This schedule may contain 200–2000 activities.
2. Construction Timeline
The Timeline is a simplified visual roadmap.
Instead of showing every activity, it shows:
Project Start
Foundation Complete
Structure Complete
Roofing Complete
MEP Complete
Finishes Complete
Handover
Example
Jan Feb Mar Apr May
Foundation ████
Structure ███████
Roofing ███
Finishes █████
Handover ▲
This is easy for clients and managers to understand.
Relationship Between Them
Master Schedule
↓
Construction Timeline
The Timeline is created from the Master Schedule.
If the Master Schedule changes:
Start dates change
Finish dates change
Milestones move
The Timeline must be updated as well.
For Your Construction Projects (8AM Contractor)
As a General Contractor, use:
Level 1 – Construction Timeline
For:
Clients
Weekly meetings
Progress presentations
Example:
Site Preparation
Foundation
Structure
MEP
Finishing
Handover
Level 2 – Master Schedule
For:
Site Engineers
Supervisors
Foremen
Internal planning
Example:
Rebar work
Formwork
Concrete work
Block work
Plastering
Painting
Door installation
Simple Rule
Master Schedule = "How will we build it?"
Construction Timeline = "When will the major phases happen?"
A good Project Manager always maintains a detailed Master Schedule and then uses a simplified Construction Timeline to communicate with clients and management.