Some shifts deserve more compensation than other shifts. For example, if you stay up all night or do a very difficult job then you should be rewarded.

So every shift has a weight. We multiply the number of hours in a shift by the weight of that shift when calculating how many hours you're signed up for.

So if you sign up for a 4 hour shift with a weight of 1.5, then it counts as if you had worked 6 hours.