kitting

Operational meaning

Kitting is the process of pre-collecting, organizing, and often packaging all components, materials, and documentation required to execute a specific production order, work step, or service task.

In manufacturing and industrial operations, kitting typically:

– Groups parts and materials by product, work order, or assembly step
– Uses a defined bill of materials (BOM) or pick list as the source of required items
– Physically separates and labels the collected items as a single “kit” for later use at a workstation or line
– May include associated paperwork such as travelers, work instructions, or quality check sheets

Kitting is used to reduce searching on the line, support consistent material availability, and enable clearer accountability for component usage.

How kitting is used in manufacturing workflows

In regulated and complex manufacturing environments, kitting commonly appears in:

– **Pre-assembly or staging areas**: Operators or material handlers pick parts from inventory locations and stage them in totes, racks, or carts as kits.
– **Line-side replenishment**: Kits are delivered to specific workstations or cells synchronized to production schedules.
– **Order-specific or lot-specific builds**: Each kit corresponds to a unique order, batch, serial number, or lot, supporting traceability.
– **Service and maintenance operations**: All spares and consumables needed for a service job are prepared as a kit before the technician starts.

Digital systems interacting with kitting include:

– **ERP / WMS**: Generate pick lists, reserve inventory, manage kit stock-keeping units (SKUs) when kits are treated as items.
– **MES**: Enforce scan-based picking, record which components are in which kit, associate kits with work orders, and track consumption at execution time.
– **Quality and traceability systems**: Capture component lot, serial, or expiry information per kit for audit and recall analysis.

Boundaries and what kitting is not

Kitting:

– **Is about pre-collection and organization of components** for a defined task or order.
– **Is typically a material handling and staging activity**, not the actual assembly or transformation of the product.

Kitting is **not**:

– **Assembly** – No value-adding transformation is required; parts are only grouped, not built into finished subassemblies.
– **Generic warehousing** – It is driven by specific work orders or product configurations, not just bulk storage.
– **Just-in-time (JIT) production** by itself – Kitting may support JIT delivery but is a distinct process step.

Common variations and practices

Kitting can take different forms depending on plant layout and product mix:

– **Order-based kitting**: Each work order or customer order has a dedicated kit.
– **Operation-based kitting**: Kits are created per routing step (e.g., one kit per station in a mixed-model line).
– **Static kitting**: Pre-defined kits for standard products or service tasks, often treated as their own SKUs.
– **Dynamic or configurable kitting**: Kit content varies based on configuration, options, or engineering changes.

Kits may be tracked by:

– Physical identifiers (tote ID, cart ID, kit label)
– System identifiers (kit number, internal tracking ID)
– Barcodes or RFID tags associated with the kit container

Kitting in MES and shop-floor control (site context)

Within MES-governed environments, kitting is often:

– **Digitally defined** via BOMs, work instructions, or configured product definitions
– **Executed under control of scan-based picking** (barcode or RFID) to verify each component
– **Location-aware**, with kits linked to storage and staging locations
– **Traceability-enabled**, capturing which lots/serials are placed into a given kit and later consumed by which order or unit

MES can support kitting areas by:

– Validating picked items against the required list
– Preventing early or incorrect consumption of scarce or regulated parts
– Providing visibility into missing, over-picked, or substituted components before the kit leaves the area

However, the physical risks of loss, misplacement, or damage in kitting areas still depend on local processes, data discipline, and material handling practices.

Related concepts and common confusion

Kitting is commonly discussed alongside:

– **Kanban / line-side supermarkets**: These focus on visual pull and replenishment signals; kitting focuses on pre-assembled sets of parts.
– **Pre-assembly / subassembly**: These involve physically building sub-components; kitting only groups parts for later assembly.
– **Picking**: Picking is selecting items from storage; kitting typically includes picking plus grouping, labeling, and sometimes verifying completeness.

Clarifying these distinctions helps when designing material flow, defining responsibilities between warehouse, kitting, and production, and when modeling processes in ERP, WMS, or MES.