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NMIMS Global Access

School for Continuing Education (NGA-SCE) 

Course: Lean Six Sigma

Internal Assignment Applicable for June 2020 Examination

Assignment Marks: 30 Instructions:

Instructions :-

•  All Questions carry equal marks.
• All Questions are compulsory
• All answers to be explained in not more than 1000 words for question 1 and 2 and for question 3 in not more than 500 words for each subsection. Use relevant examples, illustrations as far as possible.
•  All answers to be written individually. Discussion and group work is not advisable.
• Students are free to refer to any books/reference material/website/internet for attempting their assignments, but are not allowed to copy the matter as it is from the source of reference.
• Students should write the assignment in their own words. Copying of assignments from other students is not allowed
• Students should follow the following parameter for answering the assignment questions

1.  For the below shown VSM, the monthly demand is 3900 pieces with 30 working days per month. Daily work time is 8 hours excluding the break time. Calculate the TAKT time, Effective Cycle Time and process cycle efficiency (10 marks)
    
2. In this Six Sigma case study, number of billing errors in a telecom company is high due to various reasons. Billing being one of the most critical activities in any business needs extra attention. There are approx. 4.5 % errors, out of which approx. 2.5% reaches to the customer. Reduce the billing errors to less than 1 %, to ensure that customer gets correct bill to his satisfaction. Please create a project charter for the above-mentioned business problem. (10 Marks)
    
3. a. A product designer wants to determine the average amount of time it takes to assemble a toy. A sample study data of 16 times toy assembly showed an average assembly time of 14.64 minutes, with a standard deviation of 5.82 minutes. Assuming sample data is normally distributed, provide a 95% & 99% confidence interval for the mean assembly time (Z0.95 = 1.645). What would happen to confidence interval, in case #samples selected for the study are increased. (5 Marks)
   
   b. A process has inventory breakdown as follows (RM = 200 pieces, WIP = 80 pieces, FG = 400 pieces) with an average customer demand per day of 80 FG pieces (1 Piece of RM inventory is required to make 1 piece of WIP and 1 piece of WIP piece is required to make 1 piece of FG). The total Value-Added Time for the process is 970 seconds. Calculate the Process Cycle Efficiency (PCE). (5 Marks)