SLLC Intermediate study materials
SLLC Intermediate study resources

SLLC Intermediate key terms

SLLC Intermediate · Get comfortable with the vocabulary.

Postponement

Delaying final assembly or customization of a product until a customer order or regional demand is known, so generic inventory serves many variants and forecast risk falls.

Related: Assemble-to-Order, Bullwhip Effect, Safety Stock
Bullwhip Effect

The tendency for order variability to grow as it moves upstream from end customers to suppliers, driven by batching, price promotions, rationing and distorted information sharing.

Related: Demand Sensing, Postponement, Vendor-Managed Inventory
Demand Sensing

Using short-horizon, high-frequency signals such as point-of-sale data, orders and promotions to detect shifts in demand faster than periodic statistical forecasting allows.

Related: Bullwhip Effect, Forecast Accuracy, Consensus Forecast
Mean Absolute Percentage Error (MAPE)

A forecast accuracy measure averaging the absolute error divided by actual demand, expressed as a percentage; undefined when actual demand is zero and biased toward under-forecasts.

Related: Forecast Bias, Forecast Accuracy
Forecast Bias

The systematic tendency of forecasts to run consistently above or below actual demand over time, measured as average signed error rather than average absolute error.

Related: Mean Absolute Percentage Error (MAPE), Consensus Forecast
Consensus Forecast

A single demand plan agreed across sales, marketing, finance and operations, replacing competing departmental numbers so that one set of figures drives planning.

Related: Sales and Operations Planning (S&OP), Forecast Bias, Demand Sensing
Sales and Operations Planning (S&OP)

A recurring cross-functional process that balances demand plans against supply capabilities over a rolling horizon, ending in an agreed plan and reconciled financial view.

Related: Consensus Forecast, Capacity Planning, Safety Stock
Assemble-to-Order

A production approach where standard components are stocked and final configuration occurs only after a customer order arrives, shortening lead time while limiting finished-goods variety.

Related: Postponement, Make-to-Order, Safety Stock
Make-to-Order

A production strategy in which manufacturing starts only after a confirmed customer order, so lead time includes production and finished-goods inventory is minimal.

Related: Assemble-to-Order, Capacity Planning, Order Cycle Time
Capacity Planning

Comparing available labor, machine and supplier capacity against forecast or planned workload to identify shortfalls and decide on overtime, outsourcing or demand shaping.

Related: Sales and Operations Planning (S&OP), Rough-Cut Capacity Planning
Rough-Cut Capacity Planning

A medium-term check that converts the master production schedule into load on key bottleneck resources, flagging infeasible plans before detailed scheduling begins.

Related: Capacity Planning, Material Requirements Planning (MRP)
Material Requirements Planning (MRP)

A calculation that explodes a master production schedule through the bill of materials, netting on-hand and scheduled receipts to generate time-phased component and raw-material requirements.

Related: Bill of Materials, Safety Stock, Rough-Cut Capacity Planning
Bill of Materials

A structured list of all components, quantities and parent-child relationships needed to build one unit of a finished product, used for costing, picking and MRP explosions.

Related: Material Requirements Planning (MRP), Cycle Counting
Safety Stock

Buffer inventory held to absorb demand variability and supply lead-time uncertainty, sized so that a chosen service level is met at acceptable holding cost.

Related: Reorder Point, Service Level, Postponement
Reorder Point

The inventory position at which a replenishment order is triggered, typically average demand during lead time plus safety stock for a continuous-review policy.

Related: Safety Stock, Economic Order Quantity (EOQ), Cycle Counting
Economic Order Quantity (EOQ)

The order size that minimizes the sum of ordering and holding costs under stable demand and known costs, ignoring quantity discounts and variability.

Related: Reorder Point, Inventory Turnover
Cycle Counting

Counting a rotating subset of inventory items on a scheduled basis instead of a full annual physical count, allowing root-cause correction of recurring discrepancies.

Related: Bill of Materials, Reorder Point, Cross-Docking
Cross-Docking

Receiving goods and shipping them onward with little or no storage, using staged dock flow and pre-planned outbound loads to cut handling and inventory dwell time.

Related: Cycle Counting, Slotting, Last-Mile Delivery
Slotting

Assigning stock-keeping units to warehouse storage locations based on velocity, cube, weight and affinity so that picking travel and handling effort are minimized.

Related: Cross-Docking, Stock-Keeping Unit (SKU)
Stock-Keeping Unit (SKU)

The lowest level at which inventory is uniquely identified and tracked, distinguished by attributes such as product, size, color or packaging configuration.

Related: Slotting, Inventory Turnover
Inventory Turnover

Cost of goods sold divided by average inventory value over a period, indicating how many times stock is replaced and how efficiently capital is used.

Related: Economic Order Quantity (EOQ), Stock-Keeping Unit (SKU), Safety Stock
Total Cost of Ownership

A procurement view that adds purchase price to freight, duties, quality failures, inventory carrying cost and lifecycle expenses to compare suppliers on full economic cost.

Related: Landed Cost, Supplier Scorecard, Single Sourcing
Landed Cost

The delivered cost of goods including purchase price, freight, insurance, duties, tariffs and handling, used to value inventory and evaluate sourcing options.

Related: Total Cost of Ownership, Incoterms, Landed Cost
Incoterms

Standard international trade rules defining which party arranges and pays for carriage, insurance, export clearance and import duties at named points in the shipment.

Related: Landed Cost, Free on Board (FOB)
Free on Board (FOB)

An Incoterm under which the seller delivers goods on board the vessel at the named port, after which risk and main carriage cost pass to the buyer.

Related: Incoterms, Landed Cost
Supplier Scorecard

A periodic rating of suppliers against agreed metrics such as quality, delivery reliability, cost and responsiveness, used to drive improvement and sourcing decisions.

Related: Total Cost of Ownership, Single Sourcing, Supplier Relationship Management
Single Sourcing

Awarding all volume for an item to one supplier, gaining leverage and simplicity but concentrating supply risk if that source fails.

Related: Supplier Scorecard, Dual Sourcing, Supply Chain Risk
Dual Sourcing

Deliberately splitting volume between two qualified suppliers to maintain competitive tension and continuity of supply if one source is disrupted.

Related: Single Sourcing, Supply Chain Risk
Supplier Relationship Management

The structured practice of segmenting suppliers, setting joint goals and reviewing performance so that strategic partners deliver innovation, quality and reliability over time.

Related: Supplier Scorecard, Single Sourcing
Vendor-Managed Inventory

An arrangement where the supplier monitors the buyer's stock and usage data and decides replenishment quantities and timing within agreed service and inventory limits.

Related: Bullwhip Effect, Consignment Stock, Reorder Point
Consignment Stock

Inventory held at the buyer's site but owned by the supplier until consumed or sold, shifting carrying cost and obsolescence risk to the supplier.

Related: Vendor-Managed Inventory, Safety Stock
Service Level

The target probability of filling demand from stock during a replenishment cycle, used to size safety stock and balance availability against holding cost.

Related: Safety Stock, Perfect Order Rate, Order Cycle Time
Perfect Order Rate

The percentage of orders delivered complete, on time, undamaged and with correct documentation, a composite measure of end-to-end order execution quality.

Related: Service Level, Order Cycle Time
Order Cycle Time

The elapsed time from customer order receipt to delivery, spanning order processing, picking, packing and transport, and a key driver of customer-perceived responsiveness.

Related: Perfect Order Rate, Last-Mile Delivery, Make-to-Order
Last-Mile Delivery

The final leg of a shipment from a local hub to the end recipient, typically the costliest per unit and most visible to the customer.

Related: Cross-Docking, Order Cycle Time
Milk Run

A fixed route in which one vehicle collects goods from several suppliers or delivers to several customers in a planned sequence, improving vehicle utilization.

Related: Landed Cost, Last-Mile Delivery
Control Tower

A centralized team and analytics capability that aggregates supply chain data to give end-to-end visibility, exception alerts and coordinated response across partners.

Related: Supply Chain Visibility, Blockchain Provenance
Supply Chain Visibility

The ability to track inventory, shipments and orders across partners in near real time, enabling earlier exception detection and more reliable customer promises.

Related: Control Tower, Demand Sensing
Blockchain Provenance

A shared, tamper-evident ledger recording custody and handling events so that origin, certifications and chain of custody can be verified across multiple parties.

Related: Control Tower, Supply Chain Visibility
Supply Chain Risk

The likelihood and impact of disruptions from supplier failure, natural events, geopolitics or demand shocks that interrupt flow and erode service or margin.

Related: Dual Sourcing, Resilience, Scope 3 Emissions
Resilience

The capacity of a supply chain to absorb disruption, maintain critical flows and recover quickly, built through redundancy, flexibility and tested contingency plans.

Related: Supply Chain Risk, Dual Sourcing
Scope 3 Emissions

Indirect greenhouse gas emissions arising across a company's value chain, including purchased goods, upstream transport and product use, typically the largest share of footprint.

Related: Supply Chain Risk, Blockchain Provenance