Analyze Flashcards
What is the question asked in the analyze phase?
What causes the problem?
What does the tool 3 help us with?
It help us to prioritize the potential causes to further analyze
What is the cause and effect diagram?
It’s the diagram, also known as Ishikawa diagram, and it is used to find the possible root causes a.k.a. Xs
How does the cause and effect diagram work?
It is a holistic approach for a brainstorm, adding causes under different categories, using the 6 Ms
What do the 6 Ms of the Ishikawa diagram stand for?
Man, Method(SOP or process), machine, measurement system, material and mother nature
What do we do with the potential causes found in the Ishikawa diagram?
They are categorized by constant(C), noise(N) or variable(X)
What is the end goal of the analyze phase?
To get the true root causes and go to the improve phase
After categorizing, my causes found in the Ishikawa diagram as constant C, noise N or variable X. What do I do with them?
I take my Xs only and use Tool 3
How can I verify if my causes are “true root causes”?
For the green belt, we will do a process analysis.
1. Gemba
2. process visualization
3. Value analysis
4. Identify waste
How did you conduct a Gemba?
By physically, observing the process as it is happening
Tips: prioritize and set up a specific hypothesis (goal) prior gemba
Observed a specific process step (your point of interest)
What are the tools used for process visualization?
Different charts, such as flow chart, swim lane diagram, spaghetti diagram and value stream map
What tool is used to recognize waste?
TIM WOODS
What do the letters of Tim Woods stand for?
Different different types of waste:
Transport
Inventory
Motion
Waiting
Over production
Over processing
Defect
Skills
When shall you do a time analysis?
When you have a time related problem
What does the process leadtime include?
Processing time + waiting + set up + transport, etc.
What is a bottle neck?
It is the step within the process with the lowest capacity
What is a constraint?
It is a bottleneck that is preventing from reaching the customer demand
What is the exit rate or through put of a process?
It is the overall capacity of the process and it is the limited by the process step with the lowest capacity a.k.a. the bottleneck
How to calculate TAKT rate
= (requested number of parts)/given a amount of time
This is where we want TO BE
How to calculate TAKT TIME?
=(given amount of time)/(requested number of parts)
What is little’s law?
It’s a formula that calculates the expected process lead time taking into consideration the work in process and the exit rate
PLT=(WIP # of parts)/(Exit Rate #parts/t)
How can I determine my process efficiency? (PE)
PE=((value added activities time)/(total process lead time))*100
This Is a % NeedsTo Be multiplied By 100
What is the problem with Little’s law?
It is only a Snapshot in time and if the process is not balanced, then we will not have the same results all the time
What are the best conditions to apply little’s law?
A balanced process
The work in process is stable in = out
Fifo
How is data stratification done?
split the data according to different factors, to find differences and indicators of the problem.
It helps you find potentially influential factors on my data
What happens if the TAKT rate is > than the exit rate?
It means that we have a constraint
