offsite or onsite? Are there makeshift kitchens or real industrial kitchens?
It's up to the kitchen manager or a higher up to check equipment.....nothing like being offsite with a major event and rented equipment or site equipment that's necessary to pull off your menu, with something not working. An overloaded electric system blowing, an oven not being close to accurate or not having shelves, refrigerators being full, ice maker crapped out, dishes being dirty or chipped, on and on........
The difference between catering and restaurants is timing.....in catering you are typically feeding everyone at the same time, either buffet, stations, passed, plated....a good caterer knows that wedding receptions can be tricky if they are at a venue different from the ceremony, if there are many different ages, if there are photos afterwards.....
hungry young children are not fun, as a caterer you guild couples in menu planning to make sure the little darlings have kid friendly food from the time they walk in the door. things for guests to eat while for the hour or so that the wedding party is having pix taken.
When I've worked with restaurant chefs they don't always feel an urgency to be prepared to get food out at a specific time. There's a different type of mis en place involved.....you prep an amount you feel comfortable with but have backup ready if your business model requires it....(some sell an amount of food ie: 8oz of prime rib per person, some sell per person $40pp for xyz and it's not a specific amount, etc.....) Keeping the backup food safe is important, in many cases if it's stored correctly and not put out, it can be served at another time. Making sure the food looks good all the time. Making sure it's maintained it's integrity in the ovens/cambros. Making sure everyone is on the right page with what's expected. Timing: if you provide food for 1.5 or 2 hours, that's how long it's available.....the kitchen is cleaning as it goes and hopefully wrapping everything well (took a lot of learning curve for this one......lost a lot of product because of my lack of training temp staff to ziplock everything or package everything going into the coolers.) I cannot tell you how it's a juggling act to prep what you feel is needed and not over assemble time sensitive food.....then having to throw out the assembled overage after....that's profit going into the trash/employees cars/whatever.
Catering....offsite, you are in a new space all the time typically....setting up a functional kitchen many times in very basic places ie: I've catered a wedding in a children's museum for 220 guests, 3 entrees (leg of lamb, salmon, chix fingers)...2 starches, salad, 2 veg, rolls.....passed aps, grilled cheese station (cojack on white, brie with chutney crostini, chevre with pesto/tapenade, morbier with truffle honey....NOTE: little kids were taken care of immediately upon arrival) NO kitchen on site, just a room with one hand sink, we brought in tables, hot boxes, shipped the lamb from the kitchen close to service, had a crew pick up chix fingers from friend at nearby hotel, trying to dodge the mini train and get the antique elevator to work! That was a logistic challenge. 1.5 hours to setup....this was one of those events that takes a while to recover from.