Maintenance
Keeping work centers running: reactive and preventive maintenance dispatches.
Maintenance in Carbon keeps the machines on the floor running. The unit of work is a dispatch, a work-order-like record raised against a , raised either reactively when something breaks or on a recurring preventive schedule. Execution happens on the floor in MES; authoring and reporting live in the back office under Resources.
Dispatches
A maintenance dispatch is one job of upkeep: what's wrong, which work center, who's on it, and the time and parts it took. It moves through a short lifecycle:
Every dispatch carries a priority (Low, Medium, High, Critical) and a source that says where it came from: Reactive (a breakdown, the default), Scheduled (generated from a preventive schedule), or Non-Conformance (raised from a ). It also carries a severity that says who handles it: Preventive, Operator Performed, Support Required, or OEM Required. Time is tracked as events against the dispatch, and parts as dispatch items.
What it's against
A dispatch is attached to a work center and its location — the machine being maintained.
Maintenance targets a work center, not a or an equipment record. The same physical machine may also be a depreciable fixed asset, but Carbon keeps those independent. Maintenance is about keeping the production resource available, not about the asset's book value.
Preventive schedules
Recurring upkeep is defined as a maintenance schedule: a work center, a frequency (Daily, Weekly, Monthly, Quarterly, Annual), the parts it needs, and how far in advance to raise the work. A daily background job reads the active schedules and, when one is due within the advance window, generates an Open dispatch, tagged Scheduled and Preventive, with the schedule's parts copied onto it. Daily schedules honor per-weekday flags and can skip holidays.
Blocking and OEE impact
Each dispatch declares its OEE impact: Down, Planned, Impact, or No Impact. This is an availability gate, not a metric.
A dispatch marked Down or Planned blocks its work center: on the floor, a blocked work center cannot start a production operation until the maintenance clears. There is no OEE percentage or uptime ratio in Carbon. The impact value exists to gate work, not to score it. Maintenance analytics are reliability KPIs (MTTR, MTBF, spare-part cost) computed from dispatch event durations.
Material and cost
Parts used in maintenance are issued from inventory, drawing stock down through the as a Maintenance Consumption movement.
Maintenance material is an inventory movement only. It posts to the item ledger but writes no general-ledger entry, regardless of whether accounting is enabled. It reduces what's on hand; it doesn't hit the books.