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4 Pitfalls of
Estimating
According to the PMI
Practice Standard for
Project Estimating…
When you
estimate,
watch out for:
1. Not allocating
enough time
It takes time to
estimate
properly
Allow enough time to plan
your estimating work
2. Not managing
expectations
Estimates evolve
over time
Talk to your stakeholders
about confidence levels and
when they can expect more
accurate estimates
3. Specific doesn’t
mean accurate!
Provide ranges
Round up numbers or
provide early estimates as a
range to avoid being too
specific
4. Being over-
optimistic
Be realistic
Don’t assume everything
will go perfectly; be realistic
about what you can achieve
4 Pitfalls of
estimating:
• Not allocating enough time
• Not managing expectations
• Specific doesn’t mean accurate!
• Being over-optimistic
www.GirlsGuideToPM.com

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4 pitfalls of estimating