Download - 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