Question on PERM and Possible Layoffs

[kalparl]

Hello Everyone,
This is my first post, so pardon some of the ignorance.
Situation: Work for a small/midsize employer in engineering. About 1500-1800 employees. Have MS in EE from a top 25 US University. The manager and superiors are willing to initiate EB2. Have only two more years on H1b.
The current timeline looks like this. Wage-Request: As soon as the government shutdown ends. Online Job Posting: End of December. PERM Request: Early March
There is a chance of layoffs in other departments between now and February. These won't be a large-layoff, may be about 5-6 employees each in Supply Chain, Manufacturing, and Mechanical/Material Engineering. I am part of the Electrical Engineering team, and it is adding a member. So less to no possibility of reduction. The ranking order for layoffs, if they happen will be contractors, voluntary separation followed by full-time employees. So it is also likely that only contractors are asked to leave.
Question: What is the % of Reduction in Force (RIF) that would prevent the company from going ahead with PERM in February? Is there a number or a reference/document that someone can point me to?
Regards

[t75]

The size of a layoff is irrelevant.