In brief
C-parts management optimises the procurement and supply of low-value, frequently needed items whose process costs often exceed their value.
Contents
What is C-parts management?
The term comes from ABC analysis. C-parts account for a large share of items but only a small share of procurement value. Typical examples are standard parts, screws, seals, cable ties, operating supplies or maintenance consumables. Yet each of these parts still involves an enquiry, purchase order, goods receipt, putaway and invoice verification.
C-parts management therefore targets process costs, not the unit price. Common instruments are kanban systems with fixed bins, supplier-maintained shelves or vending machines at the point of use, vendor managed inventory, electronic catalogues and consolidated invoices. Often a system supplier takes over the entire range of a category.
A clear distinction is important: a low-value part can still be critical if its absence stops a plant. Despite their C classification, such parts need safety stock and defined sources of supply. The economic benefit comes mainly from fewer ordering transactions, fewer suppliers and automated replenishment processes, not from lower unit prices.
In practice: maintenance and procurement
In maintenance, combining ABC analysis with a criticality assessment makes sense. This allows standard C-parts to be automated, while inexpensive but plant-critical parts are stocked in a targeted way.
Synonyms and abbreviations: C-parts procurement · C-class parts management · C-parts supply · small parts management
Frequently asked questions
What are C-parts?
C-parts are items that account for a small share of purchasing value in an ABC analysis but make up a large proportion of the range in terms of numbers. Typical examples are standard parts, fasteners, small parts, consumables and simple wear parts. They are often needed frequently and are usually easy to procure. However, the classification says nothing about their technical importance for a machine.
What systems are there for C-parts management?
Common are two-bin kanban systems, in which an empty bin automatically triggers replenishment. There are also supplier-managed shelves, vending machines at the point of use, vendor managed inventory and electronic catalogues with consolidated invoicing. Which model fits depends on the consumption pattern, the number of withdrawal points and the desired transparency about consumption.
Can C-parts also be critical spare parts?
Yes. The ABC classification only assesses value, not the consequences of a part being missing. An inexpensive seal or sensor can stop a plant just as an expensive unit can. Despite their C classification, such parts should be flagged as critical, held with a safety stock and assigned a defined source of supply. A combination of value and criticality assessment prevents them from getting lost in automated processes.