All i really "know" about this area is that only fully repaired factories contribute to research and that each batch of ?100 points give a "chance" to accelerate by one month. Points appear to accumulate from month to month.
No idea on what the "chance" % actually is.
No idea what determines which factories get repaired.
For optimising i'm thinking expansion should be done slowly (1 or 2 factories at a time)... but is factory repair at a set rate (eg 1 per turn, randomly chosen) or a % rate (eg 1% of factories that need repairing). This could make a difference.
Research factories can be converted like production factories, so if you choose the next model in a series they take no damage - i wish i'd known a year ago
hints tips and suggestions needed! How do i get Frank in May '43? [;)]











