CPM Schedule Compression & Optimization
Analyze CPM networks and optimize schedules through crashing, fast-tracking, and resource realloc...
What You Can Do
You can analyze your project's critical path method (CPM) network to identify which activities are delaying completion and determine the most cost-effective ways to compress the schedule. The skill evaluates crashing (adding resources), fast-tracking (overlapping activities), and resource optimization strategies while quantifying impacts on labor, equipment, and contingency budgets. You'll get actionable compression recommendations ranked by cost-effectiveness and feasibility.
Features
Calculates total float, free float, and interfering float to pinpoint schedule flexibility and identify truly critical activities
Determines crash duration, crash cost per day, and resource requirements for accelerating individual activities
Identifies activities suitable for overlapping, evaluates lead/lag relationships, and quantifies schedule compression potential
Flags overallocation when compression strategies require simultaneous resource deployment across activities
Ranks compression options by cost per day recovered, helping prioritize lowest-cost acceleration strategies
Compares baseline vs. compressed schedules side-by-side with cumulative cost and resource impact summaries
Shows how compression affects key project milestones, phase gates, and contractual delivery dates
Filters recommendations based on labor availability, equipment limitations, and procurement lead times
Example Output
Scenario: 30-Day Schedule Recovery Required
Critical Path Activities (Current Duration):
- Foundation work: 14 days | Float: 0 days
- Structural steel: 21 days | Float: 0 days
- MEP rough-in: 18 days | Float: 3 days
Compression Recommendation #1 (Rank: Best ROI) Crash structural steel from 21 to 16 days (5-day reduction)
- Method: Add crew (12 workers → 16 workers)
- Cost: $8,500/day crash premium × 5 days = $42,500
- Cost per day recovered: $8,500
- Impact: Recovers 5 of 30 days needed
Compression Recommendation #2 (Rank: Second Priority) Fast-track MEP rough-in with foundation (3-day overlap)
- Method: Start MEP prep 3 days before foundation completion
- Cost: Coordination overhead = $2,200
- Cost per day recovered: $733
- Impact: Recovers 3 additional days; requires daily foundation-MEP coordination
Summary: Combining recommendations recovers 8 days at $63,833 total cost. Alternative scenario using weekend shifts on structural work reduces cost to $51,200 but requires 2 weekend mobilizations.
What's Included
- SKILL.md: Complete CPM compression methodology and decision framework
- Float Analysis Template: Spreadsheet for calculating total/free/interfering float from imported schedules
- Crashing Cost Calculator: Worksheet for entering crew sizes, equipment rates, and overtime premiums to derive crash costs
- Scenario Comparison Matrix: Side-by-side template comparing baseline vs. 2-3 compressed schedule options with cost and resource impacts
- Feasibility Checklist: Procurement lead times, labor availability constraints, and equipment limitation assessment tool
Who It's For
- Project Managers & Schedulers — Managing schedule recovery and deadline pressures in construction or engineering delivery
- Construction Control Engineers — Analyzing CPM networks and recommending acceleration strategies during project execution
- Cost Engineers — Quantifying cost impacts of schedule compression and value engineering trade-offs
- Subcontract Managers — Evaluating contractor claims for schedule recovery costs and feasibility of compressed durations
- Bid Managers — Demonstrating feasibility of aggressive delivery schedules during pre-bid schedule risk assessment
Best For
- Schedule Recovery Analysis — Recovering slip from delays without ad-hoc acceleration decisions
- Deadline Compression Planning — Meeting owner-imposed earlier completion dates through systematic trade-off analysis
- Value Engineering Studies — Evaluating schedule reduction as a cost-saving or cash flow improvement strategy
- Contractor Claim Evaluation — Assessing reasonableness of compression costs and acceleration strategies in change order negotiations
- Feasibility Studies — Pre-bid assessment of aggressive contract schedules with quantified resource and cost impacts
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