Hi Zi. The first thing is that you are probably looking at assignment units. Assignment units are the units originally assigned to the resource. The timephased % Allocation will give you allocation % for the individual time ranges (100% for that first day and something smaller for the remaining days).Another option is to use the Resume column. This is a task level field that can move the remaining work to a future date. In that case he would retain the 100% allocation for the 4 remaining hours but it will be done three days later.There are always many options and I don’t want to complicate the situation or assume that one option is better than another. Feel free to respond if you still have questions.