Thanks all I got it. The one from Niek is the most simple one.

thanks and regards

Beertje.

"Beertje" wrote:

In need a function which calculates an overall weighing factor based on
person age and the years the person is working at a company.
For each working year factor 1.
For all working years while older then 41 an addtional factor 0.5.
For all working years while older then 51 an additional factor 0.5.

Thanks for any help.