Sage Intacct keeps your books. Fuse runs your floor and posts every movement into Intacct as it happens — live, costed, and refused by Intacct if Intacct does not accept it.
Sage Intacct holds your stock figure, your valuation and your general ledger, and holds them well. What it cannot hold is the hour-by-hour reality of making things: a batch part-consumed, a pallet moved to the wrong rack, a run confirmed at end of shift, a component swapped because the first choice ran out.
So that reality lives somewhere else. A whiteboard. A shared spreadsheet. A supervisor's notebook, keyed in on Friday by someone who was not there.
Which means the stock figure is right at month end and approximately right the rest of the time — and nobody can say by how much.
Fuse gives your operational people screens shaped for their job, and posts every movement they make into Intacct as it happens. The ledger does not move. Finance does not retrain. Nothing about your Intacct setup changes except that its stock figure is now correct at four in the afternoon as well as at month end.
If Intacct rejects the post, the Fuse transaction does not stand. There is no half-committed state and no queue of failures to clear.
It records the cost Intacct accepted. Where Intacct holds no cost, it refuses and reports rather than substituting a plausible number.
Movements post as they happen. Nothing waits for an overnight run and no journal is summarised on the way through.
Accounts, customers, suppliers, items, warehouses, bins, units and tax schedules are mirrored from Intacct and read-only in Fuse.
There is never a second set of numbers to reconcile, because there is never a second set of numbers.
Because Fuse posts through a single integration account, none of these people need a seat in Intacct.
You keep the accounting system you chose, and gain the factory system you were about to leave it for.
Everything else in this pack is detail underneath that sentence.