Quality assurance

Question 4 Answer on answer sheet and upload to blackboard 4.1. Determine the trial UCL for a fraction monconforming chart for April 25 where the trial central line is 0.012. Is April 25 in control or out of control (5marks) [round off final answer to 3 decimal places) Note not all the data are shown but the suns are correct. Number Inspected Nonconforming April 24 April 25 April 26 Number Date 600 11 435 28 582 6 . . = 10000 =120 4.2. Cartoon Candy (Pty) Ltd wants to evaluate a process that produces wine gums. There are many ways in which a wine gum can be defective. It can be the wrong colour, mal- formed, or crushed, among others. a) If it is more important to track the production of defective wine gums rather than some variable then which type of chat would be appropriate and why? (3marks) b) Consider the same wine gum process. This time we are interested in the number of spots on the wire guns. Our customer has agreed to accept wine gums with no more than 3 small spots, meaning getting more than 3 small spots, the wire gumis considered to be defective Which type of chat would be appropriate and why? (3marks) 3.3 What on control charts provide evidence of the process being in-control (only common cause variation present) or out-of-control (common cause and assignable cause variation present)? (1 mark) (12 marks)