Answer Happy

You are an engineer reviewing the production line for a great new smoke alarm. The following is an extract of the FMEA that has been conducted on the product and you have been tasked with reviewing production costs and the safety of the product. Design Verification Process System Subsystem Compomat Potential Failure Mode and Effects Analysis (Design FMEA) FMEA Number Project III Prepared by Sylvia Wu FMEA Date 22/10/2020 Design Lead Key Durin Revision Date Shay Isaac See Project Ill R1 Report 21/08/2021 Come Team Page 1 of Action Hesults Recommende ин /Гинній Sev போர் iy Controls Occ Det RPN Внитриннity & larger fary:lalum іння та ан Cause Merci efflu | 9 LUDA Cor New RPN Actions Sensor A 3 Potential Potential FI Models of Failure Not atly fire 13&artly tulbul Insufficicn Failey fire valum 54 Purchase iraining and Whir olie 1.spection csalim tool 45 lavestigate alati Alarm component 8 Pataly 1 corponent Alarm housing 3 corectly cast housing Replace bousing required 4 ago 2 Alarm cover breaks at first removal 24 Nupatia quality with supplier Currently the product has the following (simplified) cost and revenue components: . The wholesale price of each sensor is $75 • The company has a contract to sell 24 000 units per year. • The company spent $350 000 to design this particular mechanism. They invested $1 million in setting up for production. The production cost is $62 per unit Your investigations have led to 2 options for improving the products

Option A: You source a calibration unit for Sensor A which costs $235 000 and will increase the rate at which you detect the problem. You believe this will reduce the "Detection" value in the FMEA analysis for the Sensor A to a value of 2. Option B: You can change the manufacturer of the alarm housing to one with better quality casting. This will reduce the "Occurrence" of the problem of the alarm housing breaking at first removal to a a value of 3 but will cost an additional $0.50 per unit. Answer the following questions: 1. For Option A, how long will it take to break even? (Answer in years to 2 decimal places) 2. For Option A, what is the new RPN for the Sensor A failure listed? 3. For Option B, how long will it take to break even? (Answer in years to 2 decimal places) 4. For Option B, what is the new RPN for the Alarm housing failure listed?

5. Which option will you suggest to your manager? (A or B) Justify your answer (You can consider the costs, revenue, breakeven, the FMEA, improved safety etc. for your answer but you must to select one of the options and give a justification for this based on the factor you think is most significant as an engineer giving a recommendation.)