jit and sqc

8/7/2019 JIT AND SQC

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Group members

KARTHIK IYERROSHAN MISHRA

GAURAV TIBREWALA


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WHAT IS JI T

It is to produce and deliver finishedgoods

It drastically cuts down the inventory atdifferent stagesIt is a complete business philosophy andthe process of thinking working andmanagement to eliminate the wasteIt follows a productivity increasingapproach


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TECHN IQUE S OF JI T

SET UP TIME REDUCING AUTONOMOUS OR MODULAR CELLS

JIT LAYOUTTHE PULL SYSTEM/BUFFER STOCK REMOVAL

CONTINOUS IMPROVEMENTTOTAL PRODUCTIVE MAINTENANCEQUALITY AT SOURCE


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SET UP TIME RED UCT ION

Set up time is the time required tochange from one job to another

Reduction In set up time is vital for theimplementation of jitIt begins the moment the last good piececomes off the machine and keeps oncontinuing


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STE PS TO R ED UCE S ET UP TIME

1. Select the machine set up to bereduced

2 . Appoint a team of 3-4 personnels

3 . Analyse set up procedure4 . Examine external activities


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AUTON OMOUS MO D ULE S ORCE

LLSJit manufacturing is organised in smallautonomous modules or cells

The cells are designed so that materialflow within the cell and between the cellis minimisedThe cell may consist of single machineor more than one machine in a line


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B ENE FITS OF CE LLULAR

MAN

UFACT

URIN

GReductionn in the cost of quality of workReduction in manufacturing lead time

Lowering of workSmaller purchase inventorySimplification of material flow

Better quantity at lesser cost


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ADVANTA GE S OF JI T

Reduced inventoriesLower per unit cost

Early detection and correction of non-conformancesReduced incoming inspectionGreater administrative efficiencyFast response to engineering changes


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D ISADVANTA GE S OF JI T

The organisation is highly vulnerable

Buying in bulk may outweigh the savings

Suppliers may raise their prices


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MEAN IN G

According to Alford and Beatty in ,SQC is the technique applying statisticalmethods based upon mathematicaltheory of profitability to control problemwith the purpose of establishing quality

standards in the most economic manner .


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TOOLS OF SQ C

CONTROL CHARTS

SAMPLING INSPECTION PLAN


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SAMPLIN G IN SP ECT ION PLAN

Acceptance sampling signifies acceptingor rejecting lots of compacted productsThe inspector is informed

AQL-acceptance quality level is termedas the highest percentage of rejectsacceptable

AQL involves producers risk


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VARIOUS TOOLS I N SQ C

Check sheets

Histogram

Scatter diagram

Control charts


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CHECK SHEET S

Efficient representationIt is a means of collection of data

Requirements of a good checksheets1. Distinguish between fact and opinion2 . Gathering data about how a problem

occurs3 . Gathering data on the types of

problems


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METH OD OLOGY OF CHECK SHEET S

1. Clearly define the objective for datacollection

2 . Create a form for collecting data3 . Collect the data for the items being

measured4 . Tally the data5 . Make check sheets clearly


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D IAGRAM


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SCATTE R D IAGRAM

Scatter diagrams are graphical toolswhich correlates the influence

It usually displays points

This tool is used in general areas


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D IAGRAM


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C ONT ROL CHA RTS


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USE S OF C ONT ROL CHA RTS

It improves productivityIt is effective in defect prevention

It provides diagnostic informationIt prevents unnecessary processadjustmentsIt provides proper informations


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Types of controlcharts

Charts for attributes

U chart P chart C chart

Charts for attributes

X bar chart R chart


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H ISTOGR AM

This is a technique used to analyse thedefects ,which are measurableaccurately

For example100 samples are taken and an important

dimension is measured .8 to 10 groupsare made and plotted on x-axis .quantityof those groups is plotted on y-axis . Thetop point of each bar is joined by asmooth curve


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D IAGRAM OF H ISTOGR AM

jit and sqc

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