PROBLEMS 405 Additional planning data follow, with costs, inventory, and each will have two consecutive days off per week and all backorders expressed in employee-month equivalents: staffing requirements will be satisfied. Give preference to the S-Su pair in case of a tie. Hegular-time $1500 Hire cost $50W/person 10. Cara Hyder manages a ski school in a large resort and is production cost trying to develop a schedule for instructors. The instructors Overtime 150% of Layoff cost $7000/person receive little salary and work just enough to earn room production cost regular-time and board. They do receive free skiing, spending most of production cost their free time tackling the resort's notorious double black Subcontracting $2500 Current 10 diamond slopes. Hence, the instructors work only four days cost backorders a week. One of the lesson packages offered at the resort is Inventory $100 Current a four-day beginner package. Ryder likes to keep the same holding cost inventory instructor with a group over the four-day period, so she schedules the instructors for four consecutive days and then Backorder cost $1000 Desired ending 0 three days off. Hyder uses years of experience with demand inventory forecasts provided by management to formulate her instruc- Maximum 70 % of regular- Current 130 employees for requirements for the upcoming month overtime time capacity employ ent TH Hiring costs are lower than layoff costs because the facil- Requirements 7 5 5 69 ity is located near a technical training school. Undertime is paid at the rate equivalent to regular-time production. Each a. Determine how many instructors Ryder needs to employ. employee who has been with the company at least Give preference to Saturday and Sunday off. Hint: Look one year also receives 0.5 months of paid vacation. All 130 employees currently employed qualify for vacations next for the group of three days with lowest requirements. year, assuming that they remain on the workforce. Answer b. Specify the work schedule for each employee. How much the following questions using an Excel spreadsheet that you slack does your schedule generate for each day? developed on your own. 11. The mayor of Black Creek, wanting to be environmentally a. Develop an SKOP with the level strategy using overtime, progressive, has decided to implement a recycling plan. A undertime, and vacations as the only supply options. residents of the city will receive a special three-part bin to Use the maximum amount of overtime so as to minimize separate their glass, plastic, and aluminum, and the city will undertime. What is the total cost of this plan, and what be responsible for picking up the materials. A young city and are its advantages and disadvantages? regional planning graduate, Janet Sanchez, has been hired b. Develop an SKOP with the chase strategy. Part of your to manage the recycling program. After carefully studying the city's population density, Sancher decides that the decision wil be when and how many vacation periods to following numbers of recycling collectors will be needed: grant. What is the total cost of this plan, and what are its advantages and disadvantages? Day M W F S SU c. Develop an SKOP with a lower cost than found with Requirements 12 7 9 9 5 3 6 either the level or chase strategy, being open to the full range of supply options (including anticipation inventory). The requirements are based on the populations of the Subcontractors can supply up to 50 employee-month various housing developments and subdivisions in the city equivalents. What is the total cost of this plan, and what and surrounding communities. To motivate residents of some are its advantages and disadvantages? areas to have their pickups scheduled on weekends, 9. Gerald Glyn manages the Michaels Distribution Centre. a special tax break will be given. After careful examination of his database information, he has a. Find the minimum number of recycling collectors required determined the daily requirements for part-time loading dock. if each employee works five days a week and has two personnel. The distribution centre operates 7 days a week consecutive days off. Give preference to S-Su when that and the daily part-time staffing requirements are as follows: pair is involved in a tie. Day M h. Specify the work schedule for each employee. How much Requirements 6 3 slack does your schedule generate for each day? C. Suppose that Sanchez can smooth the requirements Find the minimum number of workers Glynn must hire. further through greater tax incentives. The requirements Prepare a workforce schedule for these individuals so that then will be 8 on Monday and 7 on the other days of
