Value Stream Mapping Flashcards
7 cards from real DAC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Value Stream Mapping flashcards as text
In Value Stream Mapping, what does 'takt time' represent?
Answer: The rate at which work must be completed to meet customer demand
Takt time is the available production time divided by customer demand rate, representing the pace work must flow to satisfy customers.
Which type of waste in Value Stream Mapping refers to producing more than what the customer currently needs?
Answer: Overproduction
Overproduction is considered the worst waste in Lean thinking because it creates additional inventory, space needs, and other downstream wastes.
When a DAC coach facilitates a VSM workshop, what is the recommended first step after assembling the team?
Answer: Identify and agree on the product family or value stream scope
Scoping the value stream by selecting the product family ensures the team maps the right flow before gathering any data.
In a VSM current-state map, a 'push' arrow indicates what about the flow of work?
Answer: Work is scheduled and released without regard for downstream capacity
A push arrow shows that upstream processes push work downstream regardless of whether the next step is ready to receive it, often creating queues.
What is the primary purpose of calculating 'process efficiency' in a Value Stream Map?
Answer: To reveal the ratio of value-added time to total lead time
Process efficiency = value-added time ÷ total lead time, exposing how much of the elapsed time actually adds value for the customer.
Which symbol on a Value Stream Map typically represents an external customer or supplier?
Answer: A factory or building icon
External customers and suppliers are depicted as factory/building icons positioned at the top corners of the VSM to represent the boundaries of the value stream.
In Disciplined Agile, how does Value Stream Mapping support the 'Optimize the Whole' principle?
Answer: By providing a systemic view that reveals interdependencies and systemic waste across the entire flow
VSM exposes the end-to-end system, preventing local optimization that improves one step while degrading overall flow—aligning with DA's goal to optimize the whole value stream.