Estimate Activity Durations in ClickUp

Estimate Activity Durations is the process of estimating the number of work periods needed to complete individual activities with estimated resources. This process is performed throughout the project.


1. Project management plan
– Schedule management plan
– Scope baseline
2. Project documents
– Activity attributes
– Activity list
– Assumption log
– Lessons learned register
– Milestone list
– Project team assignments
– Resource breakdown structure
– Resource calendars
– Resource requirements
– Risk register
3. Enterprise environmental factors
4. Organizational process assets


1. Expert judgment
2. Analogous estimating
3. Parametric estimating
4. Three-point estimating
5. Bottom-up estimating
6. Data analysis
– Alternatives analysis
– Reserve analysis
7. Decision making
8. Meetings


1. Duration estimates
2. Basis of estimates
3. Project documents updates
– Activity attributes
– Assumption log
– Lessons learned register

Create Project Management Tasks

In the Planning list, representing Planning Process Group, create the Estimate activity durations task with subtasks corresponding to the output of the Estimate Activity Durations process: Develop duration estimates, Develop basis of estimates, and Update project documents.

Create Project Management Documents

In the Docs section, create the Duration Estimates and Basis of Estimates documents.

Duration estimates are quantitative assessments of the likely number of time periods that are required to complete an activity, a phase, or a project. They do not include any lags.

In Basis of Estimates, supporting detail for duration estimates may include:

  • Documentation of the basis of the estimate
  • Documentation of all assumptions made
  • Documentation of any known constraints
  • Indication of the range of possible estimates
  • Indication of the confidence level of the final estimate
  • Documentation of individual project risks influencing this estimate

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