Serving cold dishes that need to be hot is really a no go in the hospitality industry. If this happens then this can have very adverse consequences and you do not want that. It may happen that you have to prepare various dishes for a number of guests, but the preparation time differs greatly between the dishes. It is then important to keep the dishes that were previously ready warm until the other dishes are also ready and can be served. Keeping these dishes warm does not have to be difficult, this can already be achieved through a heat tray or heat lamps.
At Baking and Cooking there are various solutions for keeping your dishes warm, feel free to take a look at the range and choose what suits you and your kitchen best.