How many changes are too many changes?

Chemical engineering, Plant designs related to chemical, petro-chemical or oil&gas, Operational assistance, etc.
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ww2i
Posts: 8
Joined: 20 Nov 2025, 21:06
Area of interest: Petroleum Engineering

How many changes are too many changes?

Post by ww2i »

Considering a reasonable sized petrochemical unit, how many plant /process /mechanical changes should be considered as "too many" changes?
Looking for thoughts here.
ivani1
Posts: 63
Joined: 25 May 2025, 14:25
Area of interest: Mechanical Engineering

Re: How many changes are too many changes?

Post by ivani1 »

You would be having this idea yourself as well that there would not be a specific number to call for this "too many" however, I truly believe that this kind of question should be asked within the organization to ascertain what exactly they are capable to handle and what they are actually handling. Operations & maintenance personnel calling for frequent MOCs may provide indicators that there are issues somewhere in engineering design itself or the construction practices.
Now what we have is for our medium sized site, 20 changes are normally coming up through our SOC process.
Temporary are anywhere from 10-15 in number, which I believe is on the higher side. Ratio here is greater than 50%.
We have dedicated team managing all these changes, and the work as I see is well distributed for its engineering studies, procurement times, and executing the changes.
ww2i
Posts: 8
Joined: 20 Nov 2025, 21:06
Area of interest: Petroleum Engineering

Re: How many changes are too many changes?

Post by ww2i »

thanks ivani1.
This is what you are talking about the permanent plant changes?
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