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Manufacturing Cells

WorkCell Design & Layout

A Rationalized Approach To Cellular Manufacturing

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Cellular Manufacturing Video

manufacturing strategy

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Workcells and Cellular Manufacturing are at the heart of Lean Manufacturing. Their benefits are many and varied. They increase productivity and quality. Cells simplify material flow, management and even accounting systems.

Workcells appear simple. But beneath this deceptive simplicity are sophisticated Socio-Technical Systems. Proper functioning depends on subtle interactions of people and equipment. Each element must fit with the others in a smoothly functioning, self-regulating and self-improving operation.

Proper  design of manufacturing workcells is an engineering problem. Like any other engineering design, it proceeds through a logical sequence of steps. At each step, the designers make compromises between conflicting requirements or technical limitations.

Doing it well requires a deep and profound knowledge of the elements of a workcell, their functions, and their interactions.

Unfortunately, many practitioners fail to recognize this. A desire for instant solutions exacerbates the situation. As a result, many manufacturers fail, create  sub-optimum cells, or produce negative unintended consequences.

The links at right outline the major tasks of cell design and their associated steps. An experienced designer performs many of these steps informally or just mentally. The process is not as complex or lengthy as the charts indicate. However, failure to perform a step results in design by accident, a risky proposition.

You can find a complete explanation of this in Mr. Lee's book, "Facilities and Workplace Design - An Illustrated Guide." 

Our seminar "Workcell Design for Lean Manufacturing" also addresses these tasks in-depth.

Work Cell Design

Download this preview Chapter from Quarterman Lee's Latest Book

Four Tasks of Cell Design

References

LEE, QUARTERMAN, Facilities and Workplace Design, Atlanta, GA, Engineering and Management Press, 1997.

WRENNALL, WILLIAM, AND LEE, QUARTERMAN, Handbook of Commercial and Industrial Facilities Management, McGraw Hill, August 1993.

Group Technology

The goal of product selection is to find compatible families of products which a group of machines can process without undo changeovers or other difficulties that result from attempting too much variety. Important tools are Process Mapping and Group Technology.

Products

Step2

Engineering the process requires a deep understanding of every process event as well as the times required for setup, personnel activities and machine cycles. 

From this we calculate the number of people required and the number of machines or workstations.

 

Process Chart

 

Economic Lot Size

Cellular Manufacturing - Step3

Infrastructural elements support the process but do not touch the product. They are many and varied. Examples are:

Containers

Scheduling

Balance Methods

Motivation

Infrastructure is intangible and cell designs often fail due to lack of awareness about it.

Kanban

Download

Workcell Design

Preview Chapter from Quarterman Lee's Latest Book for 67 pages of detailed info

Cellular Manufacturing - Step4

The fourth task in workcell design is the physical layout. This is often straightforward if the previous tasks have been done thoughtfully. The Task Procedure diagrams can often be simplified. In many cases you may start with the process chart and move directly to a layout.

Workcell Layout

 

Other Articles In This Series

Up ] Elements of A Facility Layout ] Facility Planning Levels ] The Master Site Plan for Industrial Facilities ] Macro Plant & Facility Layouts ] [ Manufacturing Cells ] Workstation Design ] Buy Ebook--Facilities & Workplace Design ] Facility Planning Forms ]

 

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