Consider the following demand patterns. Determine whether each pattern is relatively easy or relatively difficult to forecast accurately. Explain your answer.
a. Overall quarterly demand across all product lines for a multinational company.
b. Demand for a new technology product with a short product life cycle.
c. Monthly demand for a designer dress over an 18-month planning horizon.
d. Daily demand for each possible sandwich configuration at a made-to-order sandwich shop.
e. Weekly demand for lighting products at a home improvement store’s regional distribution center.