Questions from General Operations Management

Q: Meena Chavan Corp.’s computer chip production process yields DRAM chips

Meena Chavan Corp.’s computer chip production process yields DRAM chips with an average life of 1,800 hours and  = 100 hours. The tolerance upper and lower specification limits are 2,400 hours and 1,...

Q: Linda Boardman, Inc., an equipment manufacturer in Boston, has

Linda Boardman, Inc., an equipment manufacturer in Boston, has submitted a sample cut-off valve to improve your manufacturing process. Your process engineering department has conducted experiments and...

Q: The specifications for a plastic liner for concrete highway projects calls for

The specifications for a plastic liner for concrete highway projects calls for a thickness of 3.0 mm +- .1 mm. The standard deviation of the process is estimated to be .02 mm. What are the upper and l...

Q: Frank Pianki, the manager of an organic yogurt processing plant,

Frank Pianki, the manager of an organic yogurt processing plant, desires a quality specification with a mean of 16 ounces, an upper specification limit of 16.5, and a lower specification limit of 15.5...

Q: Custom Vans, Inc., specializes in converting standard vans into campers

Custom Vans, Inc., specializes in converting standard vans into campers. Depending on the amount of work and customizing to be done, the customizing can cost from less than $1,000 to more than $5,000....

Q: A process filling small bottles with baby formula has a target of

A process filling small bottles with baby formula has a target of 3 ounces +- 0.150 ounce. Two hundred bottles from the process were sampled. The results showed the average amount of formula placed in...

Q: A new process has just been established on Jianli Hu’s assembly line

A new process has just been established on Jianli Hu’s assembly line. The process is supposed to place 4 grams of a deep red coloring in each bottle of nail polish with an Upper Specification Limit of...

Q: Two machines are currently in use in a process at the Dennis

Two machines are currently in use in a process at the Dennis Kira Mfg. Co. The standards for this process are LSL = .400" and USL = .403". Machine One is currently producing with mean = .401" and stan...

Q: Product specifications call for a part at Vaidy Jayaraman’s Metalworks to have

Product specifications call for a part at Vaidy Jayaraman’s Metalworks to have a length of 1.000" +- .040". Currently, the process is performing at a grand average of 1.000" with a standard deviation...

Q: Ross Hopkins is attempting to monitor a filling process that has an

Ross Hopkins is attempting to monitor a filling process that has an overall average of 705 mL. The average range is 6 mL. If you use a sample size of 10, what are the upper and lower control limits fo...