We still have the knowledge, so assuming that knowledge is utilized i guess you could answer that question by simply reverse engineering the amount of time it t

We still have the knowledge, so assuming that knowledge is utilized i guess you could answer that question by simply reverse engineering the amount of time it took to obtain the knowledge of achieving a significant process and then determine from that point how long did it take to implement the solution. Since you would be implementing the solution only you would then need to know how many key solutions are you re building and you could figure this question out quite easily.