How is this different from float erosion?

Float erosion looks at how much buffer was consumed. This score considers density of critical work and current buffer at the same time.

Schedule

Critical Path Risk Score

Quantify the fragility of your project's critical path based on float, density of critical activities, and remaining duration.

Calculator

Score = 100 × (CriticalRatio × 0.5 + (1 − Float/Duration) × 0.5)

Critical activities count

Total activities count

Average float on critical chain (days)

Remaining duration (days)

Enter values to compute.

Interpretation Guide

0 – 40Resilient critical path.
40 – 70Moderate exposure.
> 70High fragility — replan.

Example

20 of 80 activities critical, 3 days avg float on 60-day remaining → Score ≈ 60 (amber).

Real-world use cases

Schedule reviews
Mega-project assurance
Bid risk assessment

Common mistakes

Ignoring near-critical paths with < 5 days float

Professional tips

Re-score weekly during execution

FAQ

Frequently asked questions

Related tools

Continue exploring

Float Erosion Analyzer

Track total float consumed on critical paths.

Earned Schedule Calculator

Time-based schedule performance (SPI(t)).

Schedule Compression Calculator

Cost per day of crashing the schedule.

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