TAGUCHI PHILOSOPHY-- CONCEPT OF PARAMETER DESIGN &ROBUST DESIGN THREE PRODUCT DEVELOPMENT STAGES:- PRODUCT DESIGN PROCESS DESIGN PRODUCTION SOURCES OF VARIATION IN THESE STAGES i.e.NOISE ENVIRONMENTAL VARIABLES PRODUCT DETERIORATION PRODUCTION VARIATION

TO ACHIEVE DESIRABLE PRODUCT QUALITY:- TAGUCHI SUGGESTS THREE STAGE PROCESS— SYSTEM DESIGN – TRADITIONAL R&D PARAMETER DESIGN-- TAGUCHI TOLERANCE DESIGN-- TAGUCHI TAGUCHI DEVELOPED METHOD FOR OPTIMUM VALUE OF PRODUCT & PROCESS PARAMETERS TO MINIMIZE VARIATIONS KEEPING MEAN VALUE TARGET SO THAT PRODUCTS ARE ROBUST

TAGUCHI PARAMETER AND TOLERANCE DESIGN: FOUNDED ON THREE FUNDAMENTAL CONCEPT- (a)QLTY BE DESIGNED AND BUILT IN PRODUCT (b)QLTY BEST ACHIEVED BY MINIMISING DEVIATIONS FROM TARGET (c)COST OF QLTY TO BE MEASURED AS A FUNCTION OF DEVIATION FROM STANDARD.LOSSES TO BE MEASURED SYSTEM WIDE

TM INCORPORATES STATISTICAL TECHNIQUES HELPS TO IDENTIFY NOISE VARIABLES (ENVIRONMENTAL VARIABLES,PRODUCT DETERIORATION & PRODUCT VARIATION) REDUCE VARIATION AROUND THE TARGET VALUE. CONSTRUCTED TABLES KNOWN AS ORTHOGONAL ARRAYS TO MAKE DESIGN OF EXPERIMENTS EASY & CONSISTENT. END RESULT IS ROBUST DESIGN AFFECTED MINIMALLY BY NOISE FACTORS.

LOSS FUNCTION QLTY AS LOSS IMPARTED BY PRODUCT TO SOCIETY FROM TIME IT IS SHIPPED TO CUSTOMER. QLTY LOSS RESULTS FROM CUSTOMERS DISSATISFACTION.MEASURED IN MONETARY TERMS i.e.pollution,customer complaints,poor performance,reputation,warranty costs etc. OVERALL QLTY LOSS, L=D²C D= DEVIATION FROM TARGET VALUE C=CONSTANT (AIM TO MINIMIZE LOSS)

SIGNAL TO NOISE RATIO ANOTHER TAGUCHI CONTRIBUTION:- S/N = AMT OF ENERGY FOR INTENDED FUNCTION AMT OF ENERGY WASTED FOR ROBUST DESIGN S/N SHOULD BE MAXIMISED.

JUST IN TIME MANUFACTURING PHILOSOPHY AIMS AT HAVING THE RIGHT PART AT THE RIGHT TIME AND THE RIGHT QTY ELIMINATION OF UNNECESSARY WORK AND WASTE. SAVES TIME,INVENTORY,SCRAP ETC. EMPLOYEE PARTICIPATION,STABLE ENVIRONMENT,REDUCTION OF WASTE,QC &INVOLVEMENT OF ALL

CHARACTERISTICS OF JIT MEET CONSUMER DEMANDS. TIME ELAPSED IS MINIMISED REDUCTION OF INVENTORIES USAGE OF CONTAINERS PLANT SHOULD BE CLEAN.NO WASTAGE VISIBLE SIGNALS TO DISPLAY STATUS OF MACHINERY

GOALS OF JIT ORGn TO BE COMPETITIVE. INCREASING EFFICIENCY OF PRODn PROCESS. REDUCING WASTAGE. RESPONDING TO CUSTOMER NEEDS OPTIMAL QLTY GOOD RELATIONSHIP WITH SUPPLIERS DESIGN PLANT FOR MAX EFFICIENCY &EASE OF MFG.