The Application of Advanced Control Charts in Textiles

MANAGEMENT

The Application of Advanced Control Charts in Textiles Subhankar Maity* Department of Textile Technology, Dr. B.R. Ambedkar National Institute of Technology Abstract                                               Keywords         

    

1. Introduction                                                    

                                          x          

2. Individuals Control Charts                                                              

x         d2           d2               d2                                 

                          



    

   x     x           

MANAGEMENT                                                                           

Figure 2.1: MINITAB output of individual chart of mass of wet wipe packet

             x                           x         x                                UCL or LCL.

    

Table 2.1: Result of weight measurement of packs of wet wipes

Batch

mass(gm)

Moving Range





































































x  

  

3. Zone Chart                                                                                                                    

Employer : We need someone for this Job, who is Responsible. Applicant : Sir, your search ends here, in my previous job, whenever anything went wrong, they said I am Responsible... 

   

MANAGEMENT            

                              

                                                                        

Table 3.1: Test results of Nonwoven GSM

Sample no

Average GSM

Grand Mean

Standard Deviation





































































Figure 3.1: Interpretation of Zone chart

                                                                 

Figure 3.2: Zone chart of Nonwoven GSM

           

    

                                       

MANAGEMENT Table 4.1: CUSUM Chart of gsm data of 25 samples of spunlace nonwoven fabric

4. CUSUM Control Charts                                      

Sr.no. Garment Target x i-40 Cumulative sum (i) GSM (xi) Si=(xi-40)+Si-1

                  

    

mx   x                              x                                                                                                                   





































































































































































































































































Figure 4.1: CUSUM control chart 

   

MANAGEMENT                         

       VMask                V-Mask            V-Mask   

            V-Mask              V-Mask    V-Mask          V                   V-Mask                               V      V                     

V-Maskhk  alpha  beta                                                                                      hk  x k        l d         

Figure 4.2: Illustration of V mask of CUSUM chart

    V-Mask           V-Mask                                  VMask      k     h       V-Mask   d                V-Mask    

             hk kh 

 I have not failed. I've just found 10,000 ways that won't work."     

    

h                                        h  k              k         h      

MANAGEMENT                                  

Figure 4.3: CUSUM chart with V-mask of nonwoven GSM, process means drift in lower side

     V                           V      V     

Figure 4.4: CUSUM chart with V mask for nonwoven GSM, process means drift in lower side

                                      

                SH(i)        i  SL(i)        i     

    

Table 4.2: Nonwoven GSM measurement

 

 

















































sH(i)  max x  K  i-1  sH(i)  max   Kxi  sL i     sH   sL    K                                                                sHmax xisHmax sL   maxxsL   max 

   

                                                                       n         t n                                                                                                          s2   s2  t                   ks     ks    k                                                             

Table 4.3: Test result and analysis of Tabular CUSUM

Observation

Upper Sum

Lower Sum





  

 







































































































































































































































































































                                                                                                                t                      

                      

    

MANAGEMENT

MANAGEMENT                                                                       s                                    

Figure 5.1: EWMA chart of nonwoven GSM

        6. Conclusions                                                                                                                                                                                                                          

    

Table 5.1: nonwoven GSM data of 25 samples

Sample no.                         

GSM                          

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MANAGEMENT                   

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References       International Seminar on Industrial Engineering and Management             Textile Research Journal 14          Pak. J. Agli. Sci29    Quality Engineering 16      Introduction to Statistical Quality Control                    Theory And Problems of Statistics      

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    

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