How do we forecast the final project cost?

Incomplete cost-to-complete forecast

Combine reliable actual costs with a current estimate of remaining work and commitments. Explain assumptions and uncertainty rather than extrapolating a percentage that ignores changed conditions.

What to do now

  1. Reconcile actual costs to date
  2. Review remaining work with owners
  3. Include commitments and known exposure
  4. Publish a range with assumptions and decisions
Recommended action flow for incomplete cost-to-complete forecast: Reconcile actual costs to date then Review remaining work with owners then Include commitments and known exposure then Publish a range with assumptions and decisions. Escalate when the forecast exceeds the authorized budget or depends on unapproved savings.

When to escalate

Escalate when

The forecast exceeds the authorized budget or depends on unapproved savings.

Who decides

The budget owner and authorized finance representative

Example

A project adds expected remediation and support-transition effort to its current forecast.

Mistake to avoid

Assuming the original remaining budget equals the cost to finish.

Prevent a repeat

Review remaining cost and commitments, not only money already spent; reconcile with the authorized finance source.

Related cases

Practice references