Waste Identification & Process Improvement Flashcards

What is the primary goal of waste identification in Lean?

Answer: Eliminate non-value-added activities

In Lean methodology, 'waste' refers to any activity that consumes resources but does not add value from the customer's perspective. The primary goal of identifying these non-value-added activities is to systematically eliminate them from the process. By removing waste, organizations can improve efficiency, reduce costs, shorten lead times, and ultimately deliver greater value to the customer.

Which of the following is NOT one of the 8 wastes in Lean?

Answer: Customer service

The 8 wastes (or 'Muda') in Lean are commonly remembered by the acronym DOWNTIME: Defects, Overproduction, Waiting, Non-utilized talent, Transportation, Inventory, Motion, and Overprocessing. Customer service, while a crucial business function, is not categorized as one of these specific forms of waste. In fact, excellent customer service is a value-adding activity that Lean aims to support by optimizing processes.

What tool is commonly used to identify waste in a process?

Answer: Value Stream Mapping

Value Stream Mapping (VSM) is a foundational Lean tool specifically designed for visualizing the entire flow of a process, from raw materials to the customer. By mapping both material and information flow, VSM makes it easy to pinpoint areas of waste, such as excessive inventory, waiting times, and unnecessary steps. This comprehensive visualization facilitates the identification and subsequent elimination of waste.

What is a common cause of overproduction waste?

Answer: Poor inventory control

Overproduction is the waste of producing more than is needed, sooner than needed, or in greater quantities than required by the next process step or customer. Poor inventory control, often driven by inaccurate forecasts or a 'just-in-case' mentality, leads to producing excess goods. These excess goods then sit in storage, consuming resources and incurring costs without immediate customer demand, directly causing overproduction waste.

Which approach is used in Lean for process improvement?

Answer: Kaizen

Kaizen is a Japanese term meaning 'change for the better' or 'continuous improvement.' In Lean, Kaizen refers to a philosophy and set of practices focused on making small, incremental improvements to processes on an ongoing basis. It encourages all employees to actively participate in identifying and implementing improvements, leading to sustained gains in efficiency and quality over time.

What is a 'bottleneck' in process improvement?

Answer: A constraint slowing down workflow

A bottleneck in a process is a point where the flow of work is restricted or slowed down, causing a backlog or delay in subsequent steps. It acts as a constraint that limits the overall capacity and speed of the entire process. Identifying and addressing bottlenecks is crucial in Lean because they often represent significant sources of waiting waste and impede efficient value delivery.

Which tool helps prioritize which problems to solve first?

Answer: Pareto Chart

A Pareto Chart is a bar graph that displays categories of data in descending order of frequency, along with a cumulative percentage line. It is based on the Pareto Principle (80/20 rule), which suggests that roughly 80% of problems come from 20% of causes. By visually highlighting the most significant problems or causes, a Pareto Chart helps teams prioritize their efforts to address the issues that will yield the greatest impact.

What does 5S stand for in Lean?

Answer: Sort, Set in order, Shine, Standardize, Sustain

5S is a Lean methodology for organizing and managing the workplace to improve efficiency, safety, and visual control. The five S's stand for Sort (eliminate unnecessary items), Set in order (organize remaining items), Shine (clean and inspect), Standardize (create consistent procedures), and Sustain (maintain the discipline). Implementing 5S creates a clean, orderly, and productive work environment, which is fundamental to Lean operations.

What is the goal of standard work in Lean?

Answer: To maintain consistency and support improvement

Standard work in Lean involves documenting the current best practices for a process, ensuring that every operator performs tasks in the same, most efficient way. This consistency reduces variability, makes problems more visible, and provides a stable baseline from which continuous improvement (Kaizen) can be measured and implemented. It ensures quality and efficiency while providing a foundation for future enhancements.