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project planning · software

Software release three-point PERT

This PERT estimate uses optimistic, most likely and pessimistic durations for a software release. Planning releases feature development and documentation, while testing follows the feature build. Approval waits for both tested software and updated documentation before deployment. The three-point values let a delivery team discuss uncertainty instead of pretending every task has a fixed duration. It is a compact model for planning a release window, identifying the longest expected sequence and testing how a delayed build affects the likely launch date. Add review, change-control or monitoring work when it constrains the actual release.

Type PERT / CPM network & Gantt chartStandard PMI PMBOK 7 + Moder 1983 (AON/PDM)Engine schematex-pertUpdated 9/24/2026
Software release PERT estimate
Drawing preview
The request

“Create a three-point PERT estimate for a software release: plan, build features, update documentation, test, approve and deploy the release.”

Then tryAdd a three-point security review before approval.Change the likely build duration to eight days.
What is in this drawing

Read the decisions behind it.

01Parallel path

Documentation can proceed after planning.

02Test gate

Testing follows feature development.

03Approval gate

Approval requires documentation and testing.

Use when release durations are uncertain.

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FAQ

Common questions

Why three values?

They capture optimistic, likely and pessimistic durations.

What can overlap?

Documentation and feature development follow planning.

What controls deployment?

Approval after documentation and testing.