Lennie is a worker for Clean&Clean Co., a car wash company….

Lennie is a worker for Clean&Clean Co., a car wash company. It seems that the company’s business is pretty good. We observed that on average 15 customers arrive every hour. The arrival is Poisson distributed.  The average car washing time is 2 minutes per car, following an exponential distribution. What is the average number of cars waiting to be washed?

When Arjun, a marketing manager at a medical equipment firm,…

When Arjun, a marketing manager at a medical equipment firm, realized that his plan to increase sales levels was not producing the results he desired, he took quick action to make necessary adjustments. According to this scenario, Arjun was exercising the management function of

The following table contains the main information of a proje…

The following table contains the main information of a project.       ACTIVITY     IMMEDIATE PREDECESSOR(S) TIME ESTIMATES (IN WEEKS)   OPTIMISTIC MOST LIKELY   PESSIMISTIC A — 4 8 10 B A 2 8 24 C A 7 12 16 D A 4 6 10 E B 1 2 3 F E, C 6 8 18 G E, C 2 3 4 H F 2 2 2 I F 6 6 6 J D, G, H 4 6 12 K I, J 2 2 3 What is the activity variance along the critical path?

The UMD bookstore expects to sell about 9,000 books in manag…

The UMD bookstore expects to sell about 9,000 books in management area next year. We understand the annual carrying cost is currently $16 per title. Every time when the bookstore needs to order a book, it must spend $75 for transportation. We assume that the bookstore opens 300 days a year. How many times per year does the store reorder?