Value Stream Mapping
Value Stream Mapping Definition
• Value Stream Mapping (VSM):
– Special type of flow chart that uses symbols known as "the language of Lean" to depict and improve the flow of inventory and information.
Value Stream Mapping Purpose
• Provide optimum value to the customer through a complete value creation process with minimum waste in: – Design (concept to customer) – Build (order to delivery) – Sustain (in-use through life cycle to service)
• Many organizations pursuing “lean” conversions have realized that improvement events alone are not enough • Improvement events create localized improvements, value stream mapping & analysis strengthens the gains by providing vision and plans that connect all improvement activities • Value stream mapping & analysis is a tool that allows you to see waste, and plan to eliminate it 4
What Is Value?
• A capability provided to a customer
– of the highest quality, – at the right time, – at an appropriate price,
as defined by the customer.
• "Value" is what the customer is buying
What Is Value Stream Analysis?
Planning tool to optimize results of eliminating waste
current state VSM future state VSM
Value Steam Mapping Steps
Next Future State
Apply Five Simple Principles
• Specify value from the standpoint of end customer • Identify the value stream for each product family • Make the product flow • So the customer can pull • As you manage toward perfection VALUE Perfection
What is the Value that Flows?
Specify value from the standpoint of the end customer Ask how your current products and processes disappoint your customer’s value expectation: • • • • • price? quality? reliable delivery? rapid response to changing needs? ??? 9
"ITEMS" flow through a value stream
– In manufacturing, materials are the items – In design & development, designs are the items – In service, external customer needs are the items – In admin., internal customer needs are the items Analysis begins with part of a total value stream, That part of the value stream has customers too 10
Value Stream Mapping Process Symbols
Customer/Supplier Icon: represents the Supplier when in the upper left, customer when in the upper right, the usual end point for material Dedicated Process flow Icon: a process, operation, machine or department, through which material flows. It represents one department with a continuous, internal fixed flow. Shared Process Icon: a process, operation, department or workcenter that other value stream families share.
Data Box Icon: it goes under other icons that have significant information/data required for analyzing and observing the system.
Workcell Icon: indicates that multiple processes are integrated in a manufacturing workcell.
Value Stream Mapping Material Symbols
Inventory Icons: show inventory between two processes Shipments Icon: represents movement of raw materials from suppliers to the Receiving dock/s of the factory. Or, the movement of finished goods from the Shipping dock/s of the factory to the customers Push Arrow Icon: represents the “pushing” of material from one process to the next process.
Supermarket Icon: an inventory “supermarket” (kanban stockpoint).
Material Pull Icon: supermarkets connect to downstream processes with this "Pull" icon that indicates physical removal.
Value Stream Mapping Material Symbols (Cont.)
FIFO Lane Icon: First-In-First-Out inventory. Use this icon when processes are connected with a FIFO system that limits input.
Safety Stock Icon: represents an inventory “hedge” (or safety stock) against problems such as downtime, to protect the system against sudden fluctuations in customer orders or system failures. External Shipment Icon: shipments from suppliers or to customers using external...
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