CH_06_10th_Edition

CH_06_10th_Edition - Process Selection and Facility Layout...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
CHAPTER 6 PROCESS SELECTION AND FACILITY LAYOUT PROBLEMS P1. Producing widgets involves fourteen production tasks, lettered a through n, below. For each task, the time required to accomplish it is given, and the immediately preceding task. Production Task Time (min.) Preceding Task a b c d e f g h i j k l m n .2 .4 .5 .4 1.0 .5 1.1 .7 .8 .4 1.2 .9 .6 .4 - a b c a e d, f g g h i k l j, m The manager expects to produce 300 widgets per eight-hour shift. The workers are allowed two 10-minute coffee breaks per shift, and 40 minutes is allocated to cleanup and maintenance tasks. a. Is it possible to accomplish the objective of 300 widgets per shift with only one workstation? b. What is the maximum possible output with 14 workstations (one workstation devoted to each task)? c. Draw the precedence diagram for this process. d. What is the theoretical minimum number of workstations which will be required to achieve an output of 300 pieces per shift? P2. Refer to the data in Problem 1. a. Assign the tasks to workstations according to the heuristic rule of the largest number of following tasks. Use longest processing time as a tie-breaking rule, if needed. b. How many workstations are required under the rule of the largest number of following tasks? c. What is the percent of idle time (or the balance delay) for this layout? d. What is the efficiency of this layout? P3. Refer to the data in Problem 1. a. Assign the tasks to workstations according to the heuristic rule of the positional weight. b. How many workstations are required under the rule of the greatest positional weight? c. What is the percent of idle time (or the balance delay) for this layout? P4. The XYZ Co. manufactures a variety of specialized products according to the orders of the customers. The plant consists of 5 departments, numbered 1 through 5 below. While some variation in the work flow is experienced, depending on the composition of the orders received, the following matrix is considered to be representative of the traffic between the departments per five-day workweek, measured in the number of forklift loads or the number of pull truck loads. 1
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 7

CH_06_10th_Edition - Process Selection and Facility Layout...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online