Pertaining to the given question:
The correct answer is option D: Programme evaluation and review technique (PERT). PERT is a project management technique that is used to analyze and represent the tasks involved in completing a project. It is commonly used in large-scale projects where there are numerous interdependent activities and uncertainties.

Explanation:
1. Programme evaluation and review technique (PERT):
PERT is a project management technique that was developed in the 1950s by the U.S. Navy to manage complex defense projects. It is a network-based scheduling technique that allows project managers to evaluate the time and resources required to complete a project.

2. Project estimation and revision technique:
This option is incorrect because it does not accurately describe the purpose of PERT. While PERT does involve estimating project timelines and making revisions, it is not solely focused on estimation and revision but also on evaluation and review.

3. Project evaluation and revision technique:
This option is incorrect because it does not accurately describe the purpose of PERT. PERT does involve project evaluation and revision, but it is not solely focused on these activities. PERT is a comprehensive project management technique that involves analyzing and representing project tasks, estimating timelines, and making revisions as necessary.

4. Period estimation and revision technique:
This option is incorrect because it does not accurately describe the purpose of PERT. While PERT does involve estimating project timelines and making revisions, it is not solely focused on period estimation and revision. PERT is a comprehensive project management technique that involves analyzing and representing project tasks, estimating timelines, and making revisions as necessary.

In conclusion, PERT stands for Programme Evaluation and Review Technique. It is a project management technique that is used to analyze and represent project tasks, estimate timelines, and make revisions as necessary. PERT is commonly used in large-scale projects where there are numerous interdependent activities and uncertainties.