Why is it we test but still find big bugs?

´Why is it, that testing slows us down?´

If I would have gotten a doll$r for everytime I heard such comments 'I would have been a millionaire by now!'

​The answer is actually quiet easy. And I can explain it with 2 pictures:
​

​Persons:
Take into account:
- You need different kind of personalities/characters.
​- You need different kind of expertise (code tester, unit tester, system tester, functional tester, acceptance tester, usability tester)
but also:
​performance tester, security tester, and so on and so fort, 

​​​Process:
​​Take into account that chronological testing of aspects might be needed. (first this, then that)
​Take into account that the order of this chronological testing can change overtime.
​Take into account that not everything can be test automated.
​Applying test automation only brings down the pressure on testing for a certain percentage %. (which can be a very very small percentage sometimes, depends on many things)


​These are ​only ​2 aspects being mentioned so far and there are many many more!

​The bigger the software package, the more software testers you need. But there is a turning point to my opinion which is around 9. (Then you need to do do some other actions.)

​​​8 testers is optimal.

'You mean to say I need ​8 software testers?'
​
​Well, depending on the size of the software package, ​​Yes you do! 

​​Minimal is 4, optimal is 8. Less then 4 is like playing chess without all the pieces.

But how many testers do I need for every programmer that I have?
​Well... It doesn't work that way... you need all chess pieces to begin with playing chess.

(In other words, you can have 1 programmer and 4 testers, you can have 4 programmers and 4 testers... but actually you can't have 1 programmer and 1 tester, because on the test part you're missing out on chess pieces in that case.) 



​You wonder why I think all this is? What my vision is based on? Go to 'Contact' tab. Send me an e-mail and I will explain my vision. 
​(Visit is possible only for companies in the Netherlands)







 
​

---