The ability of a process to meet design specifications iscalled:a) Taguchi.b) process capability.c) capability index.d) acceptance sampling.e) average outgoing quality.

1. You are an engineer working for New House Furniture Ltd, specialist in furniture manufacturing. Recently customers are returning the chairs within the warranty period as they are not happy with the product, without clear problem defined. Your task is to apply Six Sigma DMAIC method to the process of Chair Manufacturing (showing in the diagram below) to identify the tope reason for product returns and improve the quality. Driina * FIxture 1247-14 Venty pans & counts via temp ale 2910 insoect wood per Ri pian 760-11A program DFA 3 Receive Wood & CNC Cutting & Edge Routing Assemble Leg Supports Pre- Start Drilling Hardware Hardw are on no- RWork ASM Work Instructions anspeci status instrucions Template C87-0 Venty pans & Counts via témplate 3000 Fixture 1248-14 Fixture 1249-14 Assemble Seat Inspect Alignment Package & Ship Add Hardware Assemble Seat Back Package Stop Process Flow -Chair Manufacturing

7. PCDrives has a statistically in-control manufacturing process that is normally distributed. Samplemeans and ranges for 15 samples of size 5 can be found in the Problems Data workbook. Determineprocess capability indexes by estimating the standard deviation using formula (8.34). If thespecifications are 70 ± 25, what percentage will be out of specification? PCDrives             Sample x-bar    R   1 77.4 18.3   2 60.2 20.1   3 63.5 22.6   4 64.0 27.5   5 58.4 15.3   6 74.4 17.9   7 70.8 26.8   8 74.6 30.6   9 77.3 19.2   10 65.7 14.6   11 63.4 24.5   12 76.6 21.7   13 71.7 25.5   14 70.9 29.7   15 59.6 14.5

The measurement of 85 automotive cables gave an arithmetic mean of the inner diameters of 3.51 mm and a standard deviation of 0.02 mm.The value required by the manufacturer is 3.5 upper/lower tolerance +0.04/ -0.12It is requested : a. Calculate the capability coefficients Cp, Cpk and state whether or not the machine is capable of producing compliant parts, i.e. whether or not the data dispersion is well centred. If applicable, calculate the adjustment coefficient Cr.b. If scrap is obtained, state whether it is recoverable or non-recoverable and calculate the percentage of scrap.c. Plot the limits of the tolerance field and the distribution of the measured data (using mean and standard deviation).