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Production Flow Analysis

This document discusses three methods for classifying parts for cell formation: 1. Visual inspection, which involves visually grouping similar parts. 2. Parts classification and coding systems, which involve examining design/manufacturing attributes and assigning unique codes to parts. Different coding system structures are discussed. 3. Production flow analysis (PFA), which involves analyzing machine usage, route cards, and machine-part incidence data to group parts processed on the same machines.

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ErPriyeRanjan
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444 views13 pages

Production Flow Analysis

This document discusses three methods for classifying parts for cell formation: 1. Visual inspection, which involves visually grouping similar parts. 2. Parts classification and coding systems, which involve examining design/manufacturing attributes and assigning unique codes to parts. Different coding system structures are discussed. 3. Production flow analysis (PFA), which involves analyzing machine usage, route cards, and machine-part incidence data to group parts processed on the same machines.

Uploaded by

ErPriyeRanjan
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PPTX, PDF, TXT or read online on Scribd
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Cell formation

1. Visual inspection
2. Parts classification and coding
system
3. Production flow analysis (PFA)

1. Visual inspection
Least sophisticated & least expensive
Classification of parts into families by
looking at either the physical parts or
photograph and arranging them into
similar groupings.

2. Parts classification and coding


system
Grouping of parts into families
involves an examination of the
individual
design
and/or
manufacturing attributes of each
parts.
The attributes of the part are
uniquely identified by means of a
code number.
Coding system should be customengineered for a given company or

Coding system structure


i.

Hierarchical structure: interpretation of each


succeeding symbol depends on the value of the
preceding symbols.
ii. Chain type structure(polycode): interpretation of
each symbol in the sequence is fixed and does
not depend on the value of preceding digits.
iii. Hybrid structure: combination of Hierarchical
structure and Chain type structure.

Three parts classification and


coding systems
Opitz system
MICLASS system
CODE system

Opitz system
Consists of nine digits, which can be extended by adding
four more digits.
The first nine digits convey both design and
manufacturing data.
12345 called form code-primary design attributes ( main
shape, external-internal shape, m/cing of plane surface, other holes teeth and
forming).

6789 called supplementary code-( dimension, material, original


shape of raw material, accuracy).
ABCD called secondary code- (production type operation and
sequence).
12345

6789 ABCD

3. Production flow analysis (PFA)


Machine usage sheet.
Route card information.
incidence data

Machine-part

Frequency table

Module 1- Machine 1 as
nucleus

Module 2- Machine 13 as
nucleus

Modules for the given


matrix

Modules after merger

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