Example
The limited-entry decision table is the simplest to describe. The condition alternatives are simple Boolean values, and the action entries are check-marks, representing which of the actions in a given column are to be performed.
A technical support company writes a decision table to diagnose printer problems based upon symptoms described to them over the phone from their clients.
The following is a balanced decision table (created by Systems Made Simple).
| Rules | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Conditions | Printer does not print | Y | Y | Y | Y | N | N | N | N |
| A red light is flashing | Y | Y | N | N | Y | Y | N | N | |
| Printer is unrecognized | Y | N | Y | N | Y | N | Y | N | |
| Actions | Check the power cable | X | |||||||
| Check the printer-computer cable | X | X | |||||||
| Ensure printer software is installed | X | X | X | X | |||||
| Check/replace ink | X | X | X | X | |||||
| Check for paper jam | X | X | |||||||
Of course, this is just a simple example (and it does not necessarily correspond to the reality of printer troubleshooting), but even so, it demonstrates how decision tables can scale to several conditions with many possibilities.
Read more about this topic: Decision Table
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“Our intellect is not the most subtle, the most powerful, the most appropriate, instrument for revealing the truth. It is life that, little by little, example by example, permits us to see that what is most important to our heart, or to our mind, is learned not by reasoning but through other agencies. Then it is that the intellect, observing their superiority, abdicates its control to them upon reasoned grounds and agrees to become their collaborator and lackey.”
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