It is likely that Nintendo is attempting to increase production and this would (potentially) cause some reduction in current output.
Production Lines within factories will often be upgraded, new production lines added, new factories will be built or old factories will be retrofitted ... This all means that new employees will be hired while experienced employees may be moved, production lines will be shut down for quality checks and so on.
Essentially, for weeks (or months) you can see lower production with the tradeoff of much higher production when your upgrades are complete; as consumers we may not even see this increased production immediately because the hardware may be set aside for use with game releases/christmas (or simply until they announce increased production).
I could be wrong though ...
