What will you do in a case of a major breakdown? The customer wants his product in 7 days. You have one machine to run the product. Repair time is 2 week.

Dear

In this particular case if really machine repair time is2 week and customer demand is one week.

Firstly, you have to negotiate or convince to the customer.

secondly, find the potential supplier for you and make a analysis of buy and produce.

if your customer is very important than you have to buy the product from other and provide them to maintain the goodwill.

This is already too late to think of.

Working hours, overtime, customer need negotiation,...etc. Some info are missing from the question.