Describe two basic types of inspection used in sampling for process control and explain two processes at your company that could benefits from each type of inspection. In you answer gives the example of variation expected from that process.
Answer 1-
There are two types of data inspection which are below: 1. Variable or continuous scale 2. Attribute or discrete scale
1. Variable or continuous data inspection:
The variable data inspection is the type of inspection which varies time to time and it is the scale of measurement for any process used in different industrial process as well as in our daily life.
In variable data inspection there is not breakup between the process. Which means the variable data scale always vary with the time.
Examples:
Temperature, distance, Analogue signal, Acceleration, Velocity, Weight etc.
Explanation:
1- As we know that the analogue signal always varies the values from zero to its maximum values with the different periods of time. Analogue signal start from zero value and its goes to high peak and then after that its values become low which goes to minimum to zero. This example shows that this type of inspection is always continuous with time. But we should be remembering that in variable data inspection the value always was remaining continues.
2- In another example suppose a cooking oil company selling the different type of oil drums into market. Then we differentiate all these drums in local shop by checking their size , weight, volume, shapes, capacity.
2. Attribute data inspection:
In is scale of measurement in any process which should not be vary or continue. The attribute data inspection scale is measured by checking their quality. For example pour quality, bad , accept, and good , yes or not.
Examples:
1- For example we want to buy a motorbike in showroom. So then we do not need to look its engine power or its speed and other features. Just we will be choosing that looks good
References: http://www.businessballs.com/dtiresources/TQM_process_improvement_tools.pdf