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Multi-task PERT Project Estimate

PERT E=(O+4M+P)/6, σ=(P−O)/6. Independent-task variances combine; approximate normal ±1σ/±2σ ranges are illustrative, not guaranteed probabilities. Correlated risks, parallel work, calendar dates, tax and scope changes are excluded. Buffer is shown separately.

project-estimateLOCAL WORKSPACE

Enabling local controls…

Inputs and settings

Processed in this tab without uploading or storing inputs. Each text field is limited to 32 KiB and complete output to 1 MiB; additional format and model limits apply.

Results

Review the settings and run. Editing inputs clears old results.

Processing model and limits

PERT E=(O+4M+P)/6, σ=(P−O)/6. Independent-task variances combine; approximate normal ±1σ/±2σ ranges are illustrative, not guaranteed probabilities. Correlated risks, parallel work, calendar dates, tax and scope changes are excluded. Buffer is shown separately.

Data and model checked: Method reference ↗

How to use this tool

Load the example, confirm field units and processing rules, then run locally. Editing any input clears the old result. Copy or download the complete output explicitly.

When not to use it

PERT E=(O+4M+P)/6, σ=(P−O)/6. Independent-task variances combine; approximate normal ±1σ/±2σ ranges are illustrative, not guaranteed probabilities. Correlated risks, parallel work, calendar dates, tax and scope changes are excluded. Buffer is shown separately.