Program evaluation and review technique
- 1 min
perta simple utility to estimate tasks using PERT (Program evaluation and review technique)
Usage
Comma separated task list in the form "1,2,12 4,5,9 2,3,6", where whitespace separates tasks. (or you can use piping inputs echo "1,2,3 10,30,40" | pert)
Usage:
pert [optimistic,realistic,pessimistic]
Example:
pert 1,3,4
pert 10,15,20 5,7,10
pert "1,2,3" "15,17,20"
cat data.txt | pert
echo "1,2,3 9,10,14" | pert
Install
$ git clone https://github.com/arzzen/pert.git && cd pert
$ sudo make install
For uninstalling, open up the cloned directory and run
sudo make uninstall
Example
Command:
$ ./pert 5,7,10 2,3,4 10,12,14
Output:
Tasks
+--------------------------------------------------------------------------------------+
| # | optimistic | realistic | pessimistic | duration | risk | variance |
+--------------------------------------------------------------------------------------+
| 1. task | 5 | 7 | 10 | 7.16 | 0.83 | 0.68 |
| 2. task | 2 | 3 | 4 | 3.00 | 0.33 | 0.10 |
| 3. task | 10 | 12 | 14 | 12.00 | 0.66 | 0.43 |
+--------------------------------------------------------------------------------------+
| summary | - | - | - | 22.16 | 1.82 | 1.21 |
+--------------------------------------------------------------------------------------+
Three point estimates
+----------------------------------------+
| confidence | | |
+----------------------------------------+
| 1 Sigma - 68% | 20.34 | 23.98 |
| 2 Sigma - 95% | 18.52 | 25.80 |
| 3 Sigma - 99% | 16.70 | 27.62 |
+----------------------------------------+Check it out here. If you need some help, just tell me.