8.6 Summary

8.6 Summary

If you haven't previously been exposed to the power of historical data, you can be excused for not currently having any data to use for your estimates. But now that you know how valuable historical data is, you don't have any excuse not to collect it. Be sure that when you reread this chapter next year you're not still saying, "I wish I had some historical data!"

Tip #42 

If you don't currently have historical data, begin collecting it as soon as possible.