Question 4 (25 marks) a. Wayne Sharp has a system composed of three components in parallel. The components have the following reliabilities: R1 = 0.90, R2 = 0.95, R3 = 0.85 What is the reliability of the system? (5 marks) b. A typical retail transaction consists of several smaller steps, which can be considered components subject to failure. A list of such components might include: Component Description Definition of failure Find product in proper size, colour, etc. Can't find product No lines open; lines too long; 2 Enter cashier line line experiencing difficulty Won't scan; item not on fi le; Scan product UPC for name, price, 3 Jetc scans incorrect name or price 4 Calculate purchase total Wrong weight; wrong extension; wrong data entry; wrong tax 5 Make payment Customer lacks cash; check not acceptable; credit card refused 6 Make change Makes change incorrectly Question 4 (25 marks) a. Wayne Sharp has a system composed of three components in parallel. The components have the following reliabilities: R1 = 0.90, R2 = 0.95, R3 = 0.85 What is the reliability of the system? (5 marks) b. A typical retail transaction consists of several smaller steps, which can be considered components subject to failure. A list of such components might include: Component Description Definition of failure Find product in proper size, colour, etc. Can't find product No lines open; lines too long; 2 Enter cashier line line experiencing difficulty Won't scan; item not on fi le; Scan product UPC for name, price, 3 Jetc scans incorrect name or price 4 Calculate purchase total Wrong weight; wrong extension; wrong data entry; wrong tax 5 Make payment Customer lacks cash; check not acceptable; credit card refused 6 Make change Makes change incorrectly Question 4 (25 marks) a. Wayne Sharp has a system composed of three components in parallel. The components have the following reliabilities: R1 = 0.90, R2 = 0.95, R3 = 0.85 What is the reliability of the system? (5 marks) b. A typical retail transaction consists of several smaller steps, which can be considered components subject to failure. A list of such components might include: Component Description Definition of failure Find product in proper size, colour, etc. Can't find product No lines open; lines too long; 2 Enter cashier line line experiencing difficulty Won't scan; item not on fi le; Scan product UPC for name, price, 3 Jetc scans incorrect name or price 4 Calculate purchase total Wrong weight; wrong extension; wrong data entry; wrong tax 5 Make payment Customer lacks cash; check not acceptable; credit card refused 6 Make change Makes change incorrectly