Maturity Grid

The maturity grid determines the status /risk for processes/problems. A table is made for each process step/problem to see the severity.

When to use

The Risk Plot can be used in all phases of the development. From the orientation phase all the way through the mass production. Maturity Grid looks almost the same in every stage in contrast with the FMEA and Risk plot.

The risk plot is used:

At the end of each development phase to see if you can proceed to the next one

Description

A list of technical problems/processes is generated that has to be solved before starting production. A large part of the FMEA/risk plot can be used for this.

A table is made for each item. The table consist of the severity of the problem and the evolution factor. This table has 4 columns and 4 rows, this indicates in which phase the problem/process is.

The severity of the problem is represented by:

S	Process/product doesn’t comply with the safety regulations
A	Process/product doesn’t comply with the technical specification
B	Process/product give some problems and doesn’t comply with the demands of critical costumers
C	Process/product has some minor flaws

The evolution factor is represented by:

4	Cause of the problem is unknown
3	Cause of the problem is known, no solution available
2	Solution is available, but not tested yet
1	Solution is available, first tests are positive however it is not yet implemented
0	Solution is implemented

This is a representation of the evolution of a problem in time:

	Severity of the problem
Evolution factor		S	A	B	C
	4
	3
	2
	1

	Orientation phase
	Feasibility phase
	α-phase
	β-phase
	Mass production

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