String Diagram: Procedure and Purpose of String Diagram

String Diagram: Procedure and Purpose of String Diagram!

String diagram is one of method study's most helpful and easiest methods. It can be defined as a scale model on which a thread is used during a specified sequence of events to trace the path or movements of man and materials.

String diagram can also be indicated in a unique type of flow diagram. The string diagram must be drawn up to scale as a thread is used to measure distance. In case of a flow diagram, the same is not necessary. A characteristic string diagram is plotted in Fig. 4.7

A short method for string diagram building as follows:

(i) Studying and recording full information on the movement of different resources.

(ii) Draw a store area scale design and label different characteristics such as equipment, workbenches, shops, etc. 

(iii) Mark and insert board buttons at all workstations between which travel is created. It is possible to stretch more pegs/pins between the installations to trace more or less the real route taken by males and equipment.

(iv) A constant unstoppable colored string, from the first to the last advised to follow the route followed by carriers or equipment. Use strings / threads of distinct colors when showing the motion of more topics to readily recognize and distinguish their motions.

(V) Remove the string to evaluate the length of the cable, which approximates the distances performed by a employee or device or object.

Like the diagram of flow- A flow-process chart is also used to supplement it. The work study person usually follows the employee he is interested in or whose motions he intends to record. If there is a tiny region of job, the work study person can just sit on a location and notice the different employee activities from there.

This recording of motions proceeds until all the motions have been registered by the work study person believes. With insufficient data, totally misleading rewets are produced.

Examining the diagram and developing a new layout is done in the same way as we explained in the case of flow diagrams earlier. This can be achieved by shifting the thread in the different locations around the buttons. The thread length remaining is subtracted from the initial thread length. Repeat the procedure until the highest remaining thread length is acquired.

For the following purposes a string diagram is a useful aid:

(1) It reflects the record of the current collection of circumstances and therefore enables the technician to visualize the real scenario.

(2) Refers to complicated motions, back monitoring, congestion, bottle necks and over and underused shop floor routes.

(3) Aid to compare different layouts or methods of performing a job to the extent that the distances are moved.

(4) Helps trace existing movement paths to incorporate, if any, the necessary changes.

(5) It is prefixed if the frequency and distance movements are not regular.

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