Qualitative Process Analysis

8 important questions on Qualitative Process Analysis

Mention four different qualitative analysis techniques.

- Value-added analysis
- Root-cause analysis
- Pareto analysis
- Issue register

What is the difference between qualitative and quantitative analysis?

Qualitative analysis is about the questions How? and Why? (more subjective)
Quantitative analysis is about the question How much? (more scientific and mathematical)

What are the purposes of qualitative analysis? And relate the analyses to it.

- Identify and eliminate waste: Value-added analysis
- Identify, understand and prioritize issues/Issue analysis: Issue register, Root-cause analysis, Pareto analysis
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What are examples of Value-added analysis?

An example is the, which is about eliminating waste. Reduce the time line by reducing the non-value-adding wastes/activities.

Another example is the 7+1 sources of waste

How does Value-added analysis work?

First you decoricate the process into steps. Which means that you do this for every task.
Then you classify each step into:
- Value-adding (VA): produces value or satisfaction to the customer
- Business value-adding (BVA): necessary or useful for the business to run smoothly, or required due to the regulatory environment
- Non-value-adding (NVA): everything else including handovers, delays and rework

What is the purpose of Issue register and how does it work?

The purpose is to categorise identified issues as part of as-is process modelling. Usually you make a table with the following columns: issue number, name, description/explanation, impact (qualitative or quantitative), possible solution.

What are the different diagrams used for Root-cause analysis? Explain them.

Cause-effect diagrams (a.k.a. fishbone diagrams or 6M diagram): you check for measurement, material, machine, mileu, man, method and then you have everything you need to find the root of the issue.
Why-why diagrams: if you ask yourself 5 times why, you will find everything you need to find the root of the issue

What are Pareto charts about?

They are useful to prioritize a collection of issues or factors behind an issue. It is a bar chart where the height of the bar denotes the impact of each issue. The bars are sorted by impact. There overlies a superposed curve where the y-axis represents the cumulative percentage impact.

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