As you know, to obtain an optimal mixture, one must make sure that at the end of the process, this is at a temperature ranging from 25 to 30 degrees, so you need to calculate a number of factors, ambient temperature, temperature of the flour, temperature and was designed by ' the kneading during processing.
This application, calculates the water temperature to be used to achieve our goal.

1 - Enter the temperature you want to have your dough mixer end.
2 - Place where the ambient temperature is kept assume the flour.
3 - Select the mixer
4 - Click on calculate and you're done.

For more on the importance of the temperature of the dough visit this page: http: //www.zakoo.it/calcolare-temperatura-impasto/

P.S.
For any questions and please write in the comments.