Comprehensive List of Value Stream Mapping Symbols

A value stream map is a tool used in lean manufacturing to identify and communicate the value-producing processes within a factory. Value stream maps utilize a standard set of industry recognized symbols to map out the plant’s processes, from raw material to finished product.

Value stream maps are used to improve the plant’s processes, perform continuous improvement (kaizen), or reduce waste.

The following list of symbols are used in the creation of value stream maps. All images are free to use and distribute. You can click on the symbol to make it bigger, or right-click and save it to use it in Excel or any other software that will accepts .jpg value stream mapping symbols.

Symbol	Description	Notes
	Process	A manufacturing process. For example, cutting, stamping, or painting. The small box represents an information system being used by the process.
	External Supplier	An external source of raw material, services, or supplies. The name of the organization should be labelled within the symbol, for example, “XYZ Manufacturing.”
	Customer	The destination of the plant’s output. The name of the organization should be labelled within the symbol, for example, “Bob’s Distribution.”
	Data Box	Information about a process, department or facility.
	Cross-dock	A facility where incoming materials are transferred immediately to outbound shipping, without processing.
	Warehouse	A facility where inventories are placed in storage for an extended period of time.
	Movement of Inventory	An open arrow signifies the movement of product from one process to the next.
	Push movement	A “push” movement of materials is initiated within the plant, rather than by the customer.
	Truck shipment	A shipment via road. The frequency of shipments should be labelled below the symbol, for example, “daily.”
	Train shipment	A shipment via rail. The frequency of shipments should be labelled below the symbol, for example, “M, W, F.”
	Boat shipment	A shipment via boat. The frequency of shipments should be labelled below the symbol, for example, “monthly.”
	Air freight	A shipment via air. The frequency of shipments should be labelled below the symbol, for example, “weekly.”
	Information flow	A simple arrow indicates information flow between processes. For example, the production control center communicates with each process.
	Electronic information flow	A broken arrow indicates electronic information flow between processes. For example, the production control center receives orders from the customer.
	Inventory	A location of inventory storage. Usually this occurs between processes as well as the start and end of the manufacturing process.
	Inbox (paper queue)	The inbox is used to indicate where an order backlog exists.
	Electronic inbox	The electronic inbox is used to indicate where an electronic order backlog exists.
	Delay time	Used to indicate where a delay is planned into the process, due to unavailable resources, manpower, etc.
	Supermarket	A controlled inventory of work that is used to schedule upstream production. The open side faces the supplying process.
	Withdrawal	Used to indicate where a downstream process is pulling from an upstream supermarket.
	First-in-first-out station	Used to indicate a “first in, first out” flow of material between processes.
	Service level agreement flow	Used to indicate a delivery of materials governed by a Service Level Agreement (SLA). SLA’s usually have governing criteria like minimum quantities or maximum delivery time.
	Schedule information	Indicates an information flow or schedule.
	Production kanban	A kanban card. The card initiates a process to produce a product, and stays with the product from raw material to finished good.
	Withdrawal kanban	A kanban card used for transferring parts from a consuming process.
	Signal kanban	Signal kanban indicates when a batch of raw materials has been depleted and a new batch is required.
	Kanban arriving in batches	Multiple kanban cards moving through the assembly process together.
	Kanban post	A place where kanban cards are collected and held for conveyance.
	Buffer / Safety stock	A buffer, or an inventory of raw materials intended to compensate for variation within the production times of a process.
	Load leveling	A tool to intercept batches of kanban cards and level their volume and mix over time, to smoothen the production process.
	Iteration or network	A symbol placed within a process to show that it requires repetition. Planned repetition is called iteration, whereas unplanned repetition is called rework.
	Kaizen burst	Used to indicate where kaizen (continuous improvement) activities will be focused. The specific type of kaizen activity and any supporting information is noted within the bubble.
	Worker / Operator	Indicates where an operator or worker is required. Operators are not normally shown on the value stream map, but where one needs to be identified for clarity, this symbol is used.
	Milk run	Indicates a worker movement to pick up parts, equipment, or supplies.
	Phone	Used to indicate expedited information
	Expedited movement	Used to indicate expedited movement of materials.
	Milestone pacing	Indicates milestones that correspond to specific dates.
	Go-see scheduling	The process requires a schedule adjustment or confirmation by an operator.