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
Role of Operation Manager in an Organisation The challenge for operations managers would appear to be complex. In manufacturing, business drivers will be a relentless increase

Symbols, stories, and heroes are important because they ------------------------ entertain executive level management. Address the concerns of government. Acquaint customers to the

Describe a set of circumstances under which you might legitimately consider disciplinary action for a chronic complainer.

Your company, ABC Company, uses 100% inspection for all materials and requires zero defect quality of all its vendors. If bad parts are found, it cost $1.00 per part to inspect the


Bloomsday Outfitters produces T-shirts for road races. They need to acquire some new stamping machines to produce 30,000 good T-shirts per month. Their plant operates 200 hours per

How does one go about controlling workers' compensation cost, and why is that important?

Given that frame, what are some of big issues facing CEOs and Organizations. Which ones do you think are the most problematic in terms of impacting strategy?

Operating a business in an ethical manner takes time, effort and commitment. What are the key elements to a company having successful organizational ethics? What can we do as manag

All of the following are ways through which affirmative action can arise at the workplace except Answer through legal ways. Through judicial affirmative action. Consultant based af