7% is the amount of layoff larger companies can "in general" layoff without hurting operation too much. Hence why some huge companies lay of the bottom 7% of performers every year (and normally hire that amount too).
So if the layoffs come not because of hard "we have x to much cost" reasons but of "we need to be more robust for potential dives in profit and increased cost" reasons and an arbitrary number must be chosen which isn't affecting operation too much but also makes a difference 7% is a common choice "because that worked well for some other large companies". Especially when the push comes from shareholders without much company insight 7% is likely.
If your company is smaller you make decisions on a one by one basis (after having some target for rough performance where you cut). But the moment your company has 100+ or even 1000+ people that gets impractical so a % line is set for how many people need to be cut.
So if the layoffs come not because of hard "we have x to much cost" reasons but of "we need to be more robust for potential dives in profit and increased cost" reasons and an arbitrary number must be chosen which isn't affecting operation too much but also makes a difference 7% is a common choice "because that worked well for some other large companies". Especially when the push comes from shareholders without much company insight 7% is likely.
If your company is smaller you make decisions on a one by one basis (after having some target for rough performance where you cut). But the moment your company has 100+ or even 1000+ people that gets impractical so a % line is set for how many people need to be cut.