Assignable Cause

Assignable Cause-72
Problems appear when we have variations to usual systems or procedures, so in order to solve those problems we look for the causes.As I was saying before, we can just look for the first cause that comes through mind, or train our teams to do thorough analysis every time we have an issue, so as to make sure we always solve it right the first time.

Problems appear when we have variations to usual systems or procedures, so in order to solve those problems we look for the causes.

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Common causes are poor light, humidity, vibration, poor food on cafeteria, absence of a real quality program, poor supervision, poor instruction, procedures not suited to the requirements, poor arrangements for comfort of workers.

They are faults of the system, so they usually stay there until they are removed by management.

So if we really want to get rid of quality issues, the art of root causes analysis should be managed accordingly to be able to identify the real root causes, and determine if they are common (management to fix) or special (employee to fix).

If you are a six sigma practitioner, you will do this in the analyze phase of your DMAIC.

Designed to help those that are preparing to take the PMP or CAPM Certification Exam, each post within this series presents a comparison of common concepts that appear on the PMP and CAPM exams.

These quality definitions refer to variances or variations in systems, processing, or tested results.I like to say root cause analysis is an art, because in my experience, the real problem within any organization is not that we don’t know the solutions, usually the real problem is that we don’t know exactly the real root causes.We tend to be blind to some causes that seem to be obvious for other people.Identifying root causes is the key to preventing similar recurrences.With a view to monitoring and controlling manufacturing processes in industries, control charts are widely used and needed to be designed economically to achieve minimum quality costs.Moreover, the economic design does not consider statistical properties like bound on type I and type II error, and average time to signal (ATS).This paper focuses on evaluating the performance of genetic algorithm (GA) in pure economic and economic statistical design of the control chart for multiple assignable causes.Many authors have studied the economic design of the control chart for a single assignable cause.But, in practice, multiple assignable causes are more logical and realistic.My recommendation is to work in teams to solve issues, inviting experts, managers and operators, depending on the severity of the problem, so as to make sure you have ideas from anyone involved, but considering your effort is worth the benefit (usually it is).A flip chart or a computer shared in a big screen will help you collecting the ideas and keeping record of them.


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