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multiple activities affected by a single risk

2 replies [Last post]

Fri, 2017-01-27 23:06

Mark Higgins

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Joined: 27 Jan 2017

Posts: 2

Groups: None

Good evening,

I have been approached by a PM that I support who has asked a question of which i am unsure how to answer.

The question is about applying a single risk against multiple schedule activities

would the best approach be to breakdown the over arching risk into smaller multiple risks, and apply individual probability and 3 point estimate values on a task by task basis.

The risk is based around Human Resource availability

any assistance would be greatly received

Cheers

Mark

Replies

Wed, 2017-02-01 00:06

Rafael Davila

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Joined: 1 Mar 2004

Posts: 5229

Groups: Spider Project Team

Definitively resource availability might not be deterministic, this is an excellent question.

If using Spider Project I would suggest using the 3 scenarios approach to model different resource availability profiles [optimistic, pessimistic and probable] using Time or Activity resource production.

This method does not have many of the limitations Monte Carlo models do have and can be implemented using your CPM software without the need for specialized Risk software.

http://www.spiderproject.com/images/img/pdf/Methods%20and%20Tools%20of%20Success%20Driven%20Project%20Management.pdf

The following SPERT Excel Templates might help you get the distribution curves, with little modification you can get the cumulative % distributions. Statistical PERT Normal Edition uses ratio scale multipliers to modify the standard deviation of a normal curve. This lets Statistical PERT work with any bell-shaped uncertainty that can be estimated using a 3-point estimate for minimum, maximum and most likely outcomes.

https://www.statisticalpert.com/download-free-templates/#duration