Available-to-Promise (ATP)
Sales employees in your company would like to know whether their customers' orders for can openers can be fulfilled. In long-term planning for the next half-year, you have put up the master production schedule provided below. Furthermore, your sales department has given you a list of customers' orders that have already been promised. At the beginning of the year, you have 800 can openers in stock.
Master Production Schedule:
$$
\begin{array}{|l|l|l|l|l|l|}
\hline \text { January } & \text { February } & \text { March } & \text { April } & \text { May } & \text { June } \\
\hline 600 & 600 & 600 & 600 & 450 & 450 \\
\hline
\end{array}
$$
Promised orders: 1200 pieces on February 14, 1400 pieces on April 5, 450 pieces on June 10.
a. How many can openers can your sales employees promise to customers in the next six months? (Assume that the amount planned to be produced in the master production schedule is available at the beginning of each month.)
b. Is the master production schedule feasible?
c. On January 7, a customer asks for 600 can openers to be delivered instantly. How do you react?