They will probably start with random spot checks and interviews of random staffs. They may inspect your payroll records, employee contracts, look at any injury claims, etc. If they find any discrepancies they will probably expand their inspection depth & breadth and more interviews.
You will not get any notice from their inspection teams and they will possibly used a 3 man team. While you are running an F&B you probably do not have field staff working away from the establishment (unless you do your own deliveries) but if you do, you will be instructed to call them in asap to the establishment where they will be interviewed on the spot. If you have any foreign workers, woe be to you if they are not living where they are registered. Also, if you are found to be taking kickbacks from them, you are up the creek without the proverbial paddle.
If you are running a dirty house, I would suggest you start hardcore housekeeping in the morning as they could show up in a day or two. You cannot do anything except follow their orders. They will tell YOU what to do and will not entertain your suggestions.
Been there, done that. Fortunately I was only the HR & Finance Mgr but my house was in order except for two foreign employees who were taken with them when they left because of forged documents (18 months after they joined the company). It was a MOM snafu because they issued the S passes before the in-country teams hadn't yet managed to verify the validity of the degrees, but they took them with them when they left, locked them up for a week and then repatriated them to their country and banned for life from Singapore.
MOM are not to be trifled with. Good Luck.
SOME PEOPLE TRY TO TURN BACK THEIR ODOMETERS. NOT ME. I WANT PEOPLE TO KNOW WHY I LOOK THIS WAY. I'VE TRAVELED A LONG WAY, AND SOME OF THE ROADS WEREN'T PAVED. ~ Will Rogers