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Which buffer sizing method in critical chain project management is the best?
Critical Chain Project Management (CCPM)
Buffer Sizing Methods (BSMs)
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Mohammad, could you explain the differences between the two as while I've used a number of elements of the former on a few projects, I am unfamiliar with the latter.

In general, I'd say that buffers represent contingency reserves for addressing the schedule impacts related to risks which could affect activities on a given chain. Sizing them needs to consider the combined expected monetary value of those risks.

Kiron
Dear MOHAMMAD

Just as Kiron would like to know more about Buffer Sizing Methods (BSMs), what is the difference and especially the benefit of applying Buffer Sizing Methods (BSMs) to projects?
In the Critical Chain Project Management (CCPM) based on Theory of Constraints (TOC) (Goldratt, 1997), after implementation of principales of CCPM, the most important topic is the appropriate buffer size and the appropriate buffer allocation to the best project scheduling. We have 3 different kinds of buffers: Project Buffer (PB), Feeding Buffer (FB), and Resource Buffer (RB) in CCPM.
Dear My friends Kiron and Luis,

We are looking fot the best way to determine the buffer size in CCPM.

Regards,
MOHAMMAD MEHRABAN CHAKOSARI
...
2 replies by Kiron Bondale and Luis Branco
Dec 08, 2019 5:34 AM
Luis Branco
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Dear MOHAMMAD
Thanks for sharing

Do you use both methods in an integrated way?

Want to talk about the results you achieved?

By using both methods in an integrated way what is the impact on the project budget?
Dec 08, 2019 9:14 AM
Kiron Bondale
...
Mohammad -

Thanks for clarifying your original question. As I indicated in my previous response, when I've used CCPM in the past, the buffers were derived based on the expected impact of the risks to the chain of activities leading up to the buffer. The key is to get team members to provide non-padded estimates for their activities so that you don't end up "padding the padding".

Kiron
Dec 08, 2019 4:53 AM
Replying to MOHAMMAD MEHRABAN CHAKOSARI
...
Dear My friends Kiron and Luis,

We are looking fot the best way to determine the buffer size in CCPM.

Regards,
MOHAMMAD MEHRABAN CHAKOSARI
Dear MOHAMMAD
Thanks for sharing

Do you use both methods in an integrated way?

Want to talk about the results you achieved?

By using both methods in an integrated way what is the impact on the project budget?
You have to find this inside the investigation of operations literature which is the root of the critical chain method. The following was written for a friend of mine and it could help becasue it works in the practice: http://www.pmknowledgecenter.com/dynamic_s...feeding-buffers
Dec 08, 2019 4:53 AM
Replying to MOHAMMAD MEHRABAN CHAKOSARI
...
Dear My friends Kiron and Luis,

We are looking fot the best way to determine the buffer size in CCPM.

Regards,
MOHAMMAD MEHRABAN CHAKOSARI
Mohammad -

Thanks for clarifying your original question. As I indicated in my previous response, when I've used CCPM in the past, the buffers were derived based on the expected impact of the risks to the chain of activities leading up to the buffer. The key is to get team members to provide non-padded estimates for their activities so that you don't end up "padding the padding".

Kiron
Thank you all for your valuable viewpoints.

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