I know there is the term "dogfooding" and have even found other variations on the phrase "... eat our own dog food":
- "drinking our own champaign"
- "eating our own cooking"
- "ice cream our customers like to eat"
These all refer to the act of doing it; after the fact and not necessarily the point in time when it becomes a possibility. This question is looking for a term to define that point in time.
If we were to - temporarily - use the term "inception point" to refer to that point in time, a usage example could be:
"When will our widget-factory project reach the inception point?"