Process simply is 90 days 'consultation' if more than 100 people set to be laid off and 30 days if between 20 and 100 to be laid off.
There are no negotiation rights on the part of the repreeentatives so, if a company wants to they can treat it as a foregone conclusion and simply go through the motions of pretending that they haven;t made their minds up and are open to suggestion.
What can your DH do? TBH not a lot. The reps should try to get the firm to agree to try to avoid redundancies by any of the following:-
voluntary redundancies
redeployment eslewhere in company
reduced hours/overtime for all
job-shares & part time
reducing costs elsewhere (particularly contract workers, freezing other benefits)
Then the reps should seek to make sure the selection process is scrupulously fair - no discrimination, people all having equal chance to apply for jobs, the 'pool' for selection being fairly determined
Finally the reps should try to see if they can improve the compensation package - perhaps keep benefits running, pay for outplacement services etc.
BUT I emphasise that so long as the company goes through the correct legal hoops there is little that the employees can do other than hope they can prove themselves worthy of keeping their job (ie by being better at it than the person next to them)
are the emloyees beign represented by a union? That always helps.
Bear in mind that it could be just as stressful for your husband even if he ends up keeping his job - a lot of loyalty is lost and it is very demoralising and 'survivors' often suffer from depression as a result of these processes. The best thing you can do is make sure he stays as positive as possible so that he impresses his bosses, and support him as much as possible when he's at home.