8-FINANCE/QUALITY a) A company that manufactures industrial wind turbine units use EN8 mild steel tubing in their production. Their production figures and customer orders suggested that 200 units would be manufactured in January, and that to do so the company would expect to use 600 metres of steel tubing (each unit historically uses 3 metres of steel tube). Purchasing data indicates that the company would usually pay a price of 4.50 per metre for this material. In February, a review of the activity in the previous month (ie. january) showed that the actual production during the month had been a total of 185 units, and that 540 metres of steel tubing had been used to do so. The material that was used in january had been purchased at a price of 4.20 per metre Calculate the adjusted standard material quantity and standard total costs for production and the resulting material variances for this output What do the variances indicate? b) (4 marks) (mark) Maximum 100 words The customer returns section of Northumbria University Pipework Ltd deal with a total of 546 complaints in a month arising from customers being incorrectly given the wrong pipe flange on their order Customers can only order one flange in each single purchase transaction. The company sell industrial pipe flanges as part of their product range and have found that their usual monthly sales level is a total of 24,300 flanges sold Each customer purchases 3 (three) of their flanges that come in a variety of shapes and sizes, during each month Using this data, and showing your workings, determine the d.p.m.o. of the supply process and determine the level of quality that the flange supply service currently operate to. You may use any available appropriate table of z value data as required but should correctly cite any source used c) (5 marks) Northumbria University Electronics Ltd. manufacture resistors. To monitor the quality of their production they wish to use control charts to help identify possible problems. They wish to use an x-bar chart on one particular product, and have obtained the following data: 25 samples (each at a size of 4) for the product are available for analysis. The sum of the samples averages and the sum of samples standard deviations are (SUM x-bar-1680 and SUMs-72) 1680 7.29 Calculate the sigma control limits (LCL and UCL) using an appropriate value of constant, coefficient listed in the following Table Q8c Show your workings and any equations used n 3 4 0.886 0921 0.540 0.952 0.959 0.965 Table QBc-, coefficient 3mera) Comment upon the use of the waves you obtain and also upon the values of the constants in the table Oc (2 marid Maxmum 150 wor