What internal control procedure(s) would best prevent or detect the following problems?

a. A production order was initiated for a product that was already overstocked in the company’s warehouse.

b. A production employee stole items of work-in-process inventory.

c. The "rush-order" tag on a partially completed production job became detached from the materials and lost, resulting in a costly delay.

d. A production employee entered a materials requisition form into the system in order to steal $300 worth of parts from the raw materials storeroom.

e. A production worker entering job-time data on an online terminal mistakenly entered 3,000 instead of 300 in the "quantity-completed" field.