Purchase Solution

Range, Standard Deviation, Process Capacity Index

Not what you're looking for?

Ask Custom Question

Hart Manufacturing is considering using one of three suppliers. For a specific part, Hart's upper specification limit (USL) is 8.8 centimeters (cm) and its lower specification limit (LSL) is 6.5 centimeters (cm).

A. The first supplier, MAT, can adjust its mean but cannot reduce its standard deviation. Its standard deviation is 0.3 cm. What is the range (lower and upper limits) for the mean of the process if MAT wants its process capacity index to satisfy at least Hart's minimum acceptable value of 1.33?

B. The second supplier, CAT, cannot justify the mean of its process which is currently 7.5 cm. However it can improve its standard deviation if necessary. What is the maximum standard deviation allowed if CAT wants its process capability to be at least the minimum acceptable value of 1.33?

C. The third supplier, BAT, has a process whose standard deviation is 0.6 cm and the mean of its process is 7.3 cm. Can this supplier meet the minimum requirement (Cpk) of 1.33? Explain. If the supplier cannot meet the minimum (Cpk), explain if it is due to a drifting of the mean or too much variability or both.

Purchase this Solution

Solution Summary

Range, standard deviation and process capacity indexes are examined.

Solution Preview

1. Range=Cp*6ơ=1.33*6*0.3=2.394 cm

2. (x bar-LSL)/(3ơ)=1.33
(7.5-6.5)/(3 ơ)=1.33
Ơ=0.25 cm
Or ...

Purchase this Solution


Free BrainMass Quizzes
Basic Social Media Concepts

The quiz will test your knowledge on basic social media concepts.

SWOT

This quiz will test your understanding of the SWOT analysis, including terms, concepts, uses, advantages, and process.

Income Streams

In our ever changing world, developing secondary income streams is becoming more important. This quiz provides a brief overview of income sources.

Production and cost theory

Understanding production and cost phenomena will permit firms to make wise decisions concerning output volume.

Understanding the Accounting Equation

These 10 questions help a new student of accounting to understand the basic premise of accounting and how it is applied to the business world.