Tasks, predecessors and times - process design, Operation Management

Tasks, Predecessors and Times - Process Design

1329_Tasks, Predecessors and Times - Process Design 1.png

The first step in the procedure is to draw a precedence diagram, shown here, the task labels and times entered in the nodes.

The next step is to determine the cycle time required to deliver the stipulated rate of output: 

Time cycle = productive time available per hour / output per hour

3600 output per hour / (8,000/5*8)) mail shots per hour = 18 seconds

We then calculate the theoretical minimum number of workstations required. This would be the result if it were possible to design the line such that the task times were evenly spread among the workstations; a very unlikely outcome in practice. However, as we will see later, it can be used to assess the utilisation of the practicable line layout produced by the procedure.

286_Tasks, Predecessors and Times - Process Design 2.png

Theoretical minimum number of workstation = Sum of task times/cycle times = 80/18

=4.4 workstations

The next stage, the allocation of tasks to workstations, is usually conducted by heuristic (ie rule-of-thumb) methods. There are several such heuristics; we will use one of the simpler ones, the longest-task- time heuristic, the results of its application being displayed in the table below. It begins with the first workstation and consideration of the candidate tasks that could be allocated to it. In this case there is only one candidate, 'A', since no other task can begin until 'A' is complete. 'A' is allocated, its time entered, and the remaining unassigned part of the 18-second cycle time calculated and entered (18 - 15 = 3 seconds).

Posted Date: 3/16/2013 3:24:15 AM | Location : United States

Related Discussions:- Tasks, predecessors and times - process design, Assignment Help, Ask Question on Tasks, predecessors and times - process design, Get Answer, Expert's Help, Tasks, predecessors and times - process design Discussions

Write discussion on Tasks, predecessors and times - process design
Your posts are moderated
Related Questions
The purpose of the project is to evaluate the performance of a bank holding company of your choice. 1. Choose a bank holding company. You can choose from Top 50 BHCs or find a b

A food processor uses approximately 29,730 glass jars a month for its fruit juice product. Because of storage limitations, a lot size of 4,000 jars has been used. Monthly holding c

Three possible manufacturing systems can be used to produce a certain product, 1) ten universal milling machines that work in series, each one is producing a specific geometry, 2)

Q1: Explain how you might take production line approach (transferring the concepts and methodologies of operations management) to a service organization such as a branch bank. Q

I need a professional plan for this school project on this company. (• A plan of viable business options for "Family Fabrics" • A summation of expected results. Fire destroyed t

1. The fraction of orders filled by a distribution center or warehouse within a specific time period is referred to as the A. inventory turnover B. inventory supply time C

Do you believe that managers should be given more autonomy to make personnel decisions such as hiring, appraising, and compensating subordinates, or do you believe that managers sh

Put Simply, operational layout is about deciding where to put all the facilities, machines, equipment and the staff with in the operation. For an organization of you choice discuss

After reading your assigned readings on international monetary policy in this unit, visit the global beverage company of your choice. Note the number of different countries that th

1 Page maximum for the whole question] : College students are "invincible". They study on the floor, spread their materials on the floor and lean over to access them, slouch in a c