- Lean is a philosophy or methodology
- Isn't something you do
- You "think" in a lean way.
- You use tools to embody
Lean Definition
Lean is a (1) systemic (2) pursuit of perfection with (3) relentless identification and (4) elimination of waste and (5) non-value added work.
There are five aspects of it as seen in the above statement.
- Systemic
- Pursuit of perfection
- Relentless Identification
- Elimination of waste
- Non-value-added work
- Sakichi Toyoda -- Toyota Motor Corporation
Flow
Achieve smooth flow as in a river
Rocks, leaves/ branches inhibit the flow
When the flow is smooth --- waste is minimal, and velocity is high VICE VERSA.
Three kinds of work
- Value-added (VA). All three must be met for a task to be value-added.
- This is something the customer is willing to pay $
- It is right the first time. Rework is a waste
- Transformational meaning changes form (physical characteristics of the product like shape, weight, colour, etc.) / fit (fits intended application) / function (Function of what the product actually does) -- the task must change the form fit or function of the product for it to be considered value-added. An exception though is an inspection at the assembly line - it is required so we don't let out a bad product.
- Value enabling work (VE)
- Is something that has potential for elimination in future but not immediately.
- Some but not all of change to form / fit or function.
- Example banks doing a credit check - would you be willing to pay for it. I won't be. But it also depends on who the customer is. An individual wouldn't pay, however if the customer is a bank, it would be willing to pay.
- VE is usually related to regulatory / compliance (SIRA for long tail claims).
- Non-value added work (NVA)
- This is waste
- Waiting - no changes to form, fit or function.
- Rework - not done fight first time
- Transportation - Movement of work between work stations.
- Movement - How do you work? work moves between me, manager, to someone else, back to me, goes in loops. All this is waste.
- Overproduction - too much of production
- Over-processing - do something even before it is needed.
- Inventory - excessive inventory, order only what you need
- Not utilizing staff to full potential - using a highly skilled person to do silly jobs.
Gemba
Value stream
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