Railroad switching services?

Switching can take a long time for various reasons. Even a small customer, if they have complicated spotting, length of track, gates, derails the customer has to unlock, etc; these can all lead to a small amount of work taking a lonting time. Also, how many men are on the train crew? How many crossings are in the area? Are hazmat cars that need to be blocked into the train? Even if a customer switches themselves, it does not mean it will be a fast pick up or set out. Routinely., the cars may still need to be laced up and gathered off of multiple tracks. Air tests still need to be done as well, regardless of the customer having switched themselves, and air tests take time. Probably not an issue here, but another issued that can make switching drag on is if the train is short on horsepower; this can make simple moves even take a long time!