block diagramming

A Presentation onBlock and Relationship Diagramming

Submitted to:- Submitted By:-Mr. S.K. Gupta Veeraj Vashishtha(Professor Operations) (NU- MBA Year 1)

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What are

Blocks?

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Finishing Unit

Production

AssemblingShipping

Shipping

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Block Diagramming Block Diagramming is a technique of designing a

process layout and is used when quantitative data is available.

Block diagramming is one way to visualize the amount of movement that occurs between departments.

Different blocks represent different departments of the organization.

The main objective is to reduce the transportation cost

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Production

Assembling

ShippingShipping Finishing Unit

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Terms used in Block Diagramming

Unit Load: Refer to the quantity in which material is moved/transported from one department to the other.

Non Adjacent Load: Refer to the load between departments which are not adjacent in their location.

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Process of Block Diagramming

Step 1• Create a Load Summary

Chart

Step 2• Calculation of Composite

Movement

Step 3• Preparation of Trial

Layouts

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Example of Block Diagramming (cont.)Step 1: Load Summary Chart

Department 1 2 3 4 5 6

1 -- 20 20 80

2 -- 10 75

3 -- 15 90

4 -- 70

5 --

6 --

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Example of Block Diagramming (cont.)Step 1: Gather Information (Initial Layout)

2 4 3

6 5 1

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Example of Block Diagramming(contd)Step 2: Calculation of composite Movements

10

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Example of Block Diagramming (cont.)

Step 3: Develop a block plan (Show new traffic)

2

5

1

4

6

3

10

90

1570

75

8020

20

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Exercise on Block Diagramming

1 2 3

4 5

Department 1 2 3 4 5

Load Summary Chart

FROM/TO DEPARTMENT

1 — 100 502 — 200 503 60 — 40 504 100 — 605 50 —

Initial Layout

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GRID 1.

1 2 3

4 5

110

40

100

50150

200

50

60

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Solution.

1 2

3

4

5

100

200

150

50

50 6040110

Grid 2

Nonadjacent Loads: 0

2 3 200 loads2 4 150 loads1 3 110 loads1 2 100 loads4 5 60 loads3 5 50 loads2 5 50 loads3 4 40 loads1 4 0 loads1 5 0 loads

Final Chart

By adding the loads of 2 to 4 i.e.50 &4 to 2i.e.100

By adding the loads of 1 to 3

i.e.50 &3 to 1i.e.60

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Relationship Diagramming

Schematic diagram that uses weighted lines to denote location preference and is used when quantitative data is not available.

Muther’s grid format for displaying manager preferences for department locations

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Relationship Diagramming: Example

Production

Offices

Stockroom

Shipping and receiving

Locker room

Toolroom

A A

A O

O

OO

O

U

U U

U

EX

I

A Absolutely necessaryE Especially importantI ImportantO OkayU UnimportantX Undesirable

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Relationship Diagrams: Example (cont.)

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Relationship Diagrams: Example (cont.)

Offices

Stockroom

Locker room

Toolroom

Shipping and receiving

Production Key: AEIOUX

(b) Relationship diagram of revised layout.

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