QA, QC & Testing

Abnormal Conditions

In the section functional testing, the alarm clock was tested to see if all its functions worked as expected. This included whether the time could be set, the alarm could be set and whether the alarm actually came on for when it was set.

Would this be all the tests to assess that the functionality of the alarm clock was satisfactory and the alarm clock was therefore deemed ready for sale?

Yes, if the assumption was that the alarm clock was going to be used under normal conditions. Where people would use it as per the instructions supplied. So when the alarm was being set, they would follow the instructions supplied by the manual religiously.

However this is never really the case and many people don't even read the manuals before trying to use a product. Only when they become really stuck do they decide to read the manual.

It would be foolhardy therefore to assume that the tests involving just following the instructions in the manual are sufficient as the only functional tests required to make sure the product is quality assured.

 • What happens if the customer presses the date button at the same time as the time button?

 • What if they hold down the date, time and alarm buttons together for 60 seconds?

 • What happens if they press the alarm button, time and date button all at once?

These conditions whilst not specified in the normal operating instructions of the alarm clock would be classed as abnormal conditions.

Whilst the normal operation of the alarm clock would be classed as normal conditions.