Seaming Machine -Number of stitches - Comfort -Sewing skills -Oil -Client’s specification -Final Sock -Bleaching machines -Interruption -Noise -Sample sock - Knitting machine The following focus will help the company to focus on areas for a deeper analysis Socks defects. 44
Quality Management tools and techniquesC. Adela De La Cruz (160641000)Cause and Effect diagram for a socks company The cause and effect diagram helps the company to categorized the reasons, thereforetheteamcangivepriority to the areas that presented a problem and developimprovements for it. FMEA: Handling in an assignment (Example of FMEA practiced in class) 45
Quality Management tools and techniquesC. Adela De La Cruz (160641000)Descriptive Statistics The time(secnds) it takes to a machine to knit socks and pass it to the next process, 4machines out of 35 were taken as an example of a textile company. As a result, knitting Machine 4 appears to have the best performance. Confidence Intervals The time it takes the newest machine to produce socks has been recorded. A 95%confidence interval shows the true mean time it takes a new and in optimal conditionmachine to produce socks. What if this increased to 99%? 46
Quality Management tools and techniquesC. Adela De La Cruz (160641000)If this company increases the level of confidence to 99% the interval will get broader. Statistical Test It was also recorded the time it takes to the oldest machine (Knitting machine3) ( whichis not operating under optimal conditions) to produce a sock, this will allow comparingthe use of the newest (Optimal) machine(knitting machine 4) with the oldest(not inoptimal conditions-Knitting machine 3). The difference between are shown as follow; Sufficient evidence to reject H0. There is a notable difference between machine 3 and 4(p=0.000). Machine 4 is significantly quicker than machine 3. This might be because ofthe conditions of the machine. Moreover, this machine has a lot of interruption during47
Quality Management tools and techniquesC. Adela De La Cruz (160641000)the process because it needs more caution than the newest one. Graphical Displays It is possible that the operator's ability influenced the machines outputs, so the trainingof the operators for this machine has been recorded. A leading measure is recorded aswell to create a balance score card. In both operators, it appears to be a descending trend. But operator 2 reflected aninconsistent ascending and descending. Histogram To see if the time is normally distributed for one of the machines a histogram must beproduced. The data is not normally distributed in this machine; the data is considered normallydistributed when is symmetrical and bell-shaped. 48
Quality Management tools and techniquesC. Adela De La Cruz (160641000)Bar chart To determine which is the mode produced in those machines, an appropriate graphicaldisplay will show the different frequencies. The modes are the white socks in the 4 different styles.
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- Fall '20
- The Land, TQM., C. Adela De La Cruz