Lesson 27 ª

The Seven Tools Of Quality

The new seven tools of quality

Diagrams of affinity:

Diagrams of affinity work to gather and organize ideas. Through “brainstorming”, ideas are collected in letters and are later organized according to their topic. Inside a problem solution process, it makes it possible to gain a better focus on specific issues.

Diagrams of interrelation:

Utilizing a process of lateral thought after using a diagram of affinity, we try to develop logical links between seemingly related categories. We try to sketch a cause-effect relationship between the letters. This diagram also helps visualize extremely complex concepts.

Tree Diagrams:

Elaborating on the concept of Ishikawa, contexts between goals and measures are described. Starting from a goal, the possible measures/solutions are branched out in the shape of a tree until it can not be branched out any further.

Matrix Diagrams:

Graphic relationships between two factors are developed in a matrix. This is frequently used to link two lists. A typical application of this tool in the QFD “House of Quality” context.

Data Analysis Matrix (Portfolio):

This technique helps when structuring a great quantity of disorganized pieces of information and revealing implicit relationships. The data is gathered in a matrix diagram which will later be structured in, lets say, a classic portfolio. Basically, it is a factorial analysis technique.

Decision Process Graphic of the program ( problem-decision plan):

This tool helps identifying potential problems in the planning phase or stage. It also helps when we are coming up with preventive measures. Starting from the sought after objective, success relevant factors are discussed, analysed for potential problems, and valued according to their importance.

Arrow Diagrams:

PERT (Program Evaluation and Review Technique), CPM (Critical Path Method) and MPM (Metra Potential Method) are the techniques employed to visualize processes, their dependencies and optimal programming to avoid any "bottle necks". The definition of a critical path will be the weakest link in the system; this is of extreme importance.

As we mentioned above, it is very important to use all these new tools together. They can be very powerful tools on their own, but their effectiveness is multiplied if used in an integrated manner (see chart).

Seven new tools

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