The Manager Of An Asynchronous Flowline With Push Scheduling

The Manager Of An Asynchronous Flowline With Push Scheduling Work R The manager of an asynchronous flowline with "push" scheduling (work release schedules) that is currently operated at a WIP level W, is satisfied by the fact that, even though the line has very high W, the line meets and sometimes exceeds successfully its target production rate. The average cycle time experienced by the W going through the line is too long for rapid response to customer orders so the manager simply overproduces and builds more finished goods inventory, FGI, just-in-case a customer orders what is in FGI so shipment can be made rapidly. Being familiar with Little's Law from a short course he attended last year, he calculated the TH pwc and sees that his process is lean since the actual TH is same. State whether you agree with the reasoning of this manager or not, and provide a clear explanation for your position.

Paper For Above instruction The reasoning of the manager regarding his asynchronous flowline with push scheduling warrants critical analysis, particularly concerning his interpretation of Little's Law and the implications for process efficiency and customer responsiveness. While at first glance, his conclusion that the process is lean based on the observed throughput (TH) matching the calculated work-in-progress (WIP) levels might seem justified, a deeper examination suggests otherwise. It reveals fundamental misunderstandings about flow efficiency, inventory management, and the core principles underlying lean production.

The manager’s observation that the line meets or exceeds its target production rate despite high WIP levels indicates a potential misalignment between throughput and system responsiveness. High WIP, in the context of push scheduling, often leads to increased cycle times and accumulated inventory, impeding rapid response to customer orders. These effects run counter to lean manufacturing principles, which prioritize eliminating waste, reducing cycle times, and enhancing flexibility to customer demands. Merely achieving a target rate while operating at high WIP does not inherently indicate process leanliness or efficiency.

Little's Law, which relates average WIP, throughput, and cycle time (WIP = TH × Cycle Time), provides a tool for analyzing flow dynamics. The manager's calculation that the actual throughput equals the theoretical throughput (TH pwc) suggests that his process is functioning at its maximum capacity.

However, this does not account for the quality of flow or how well the system responds to variations and customer requirements. A high WIP and long cycle times imply a sluggish process that may generate

excess inventory—FGI—leading to increased waste, storage costs, and potential obsolescence.

Additionally, the practice of overproduction to ensure immediate shipment contradicts the lean principle of just-in-time (JIT) production, where producing only what is needed, when it is needed, minimizes excess inventory. Building FGI "just-in-case" increases total work-in-progress and finished goods inventory, which can hide underlying inefficiencies but does not improve overall system responsiveness or reduce lead times. It also risks creating a disconnect between production and actual customer demand, leading to inefficiencies further downstream.

The apparent compliance with Little's Law does not necessarily imply a lean operation. The law assumes a steady state and does not measure the quality of flow or waste levels. The manager’s focus on throughput alone ignores critical lean metrics such as cycle time, takt time, and value-added processing. Simply matching WIP with throughput ignores whether the process is truly optimized for responsiveness and waste reduction.

Therefore, I do not agree with the manager’s reasoning that his process is lean, based solely on throughput and WIP calculations. A process with high WIP, long cycle times, and overproduction is typically inefficient and not aligned with lean principles. To genuinely evaluate process leanliness, one must consider cycle times, value stream mapping, waste levels, and responsiveness to customer demand.

Achieving target throughput at high WIP does not equate to an efficient or agile process; instead, it often signifies an opportunity for process improvement by reducing WIP, shortening cycle times, and adopting more responsive scheduling methods such as pull systems.

References Baudin, M. (2004). The Lean School of Thought. Lean Enterprise Institute.

Goldratt, E. M., & Cox, J. (2004). The Goal: A Process of Ongoing Improvement. North River Press.

Hopp, W. J., & Spearman, M. L. (2011). Factory Physics (3rd ed.). Waveland Press.

Liker, J. K. (2004). The Toyota Way: 14 Management Principles from the World’s Greatest Manufacturer.

McGraw-Hill.

Ohno, T. (1988). Toyota Production System: Beyond Large-Scale Production. CRC Press.

Rother, M., & Shook, J. (2003). Learning to See: Value Stream Mapping to Add Value and Eliminate

MUDA. Lean Enterprise Institute.

Shingo, S. (1989). A Study of the Toyota Production System from an Industrial Engineering Viewpoint.

Productivity Press.

Spear, S., & Bowen, H. K. (1999). During kaizen progress, we focus on root cause analysis. Harvard Business Review, 77(4), 95-104.

Womack, J. P., & Jones, D. T. (2003). Lean Thinking: Banish Waste and Create Wealth in Your Corporation. Free Press.

Taylor, D., & Williams, R. (2010). The Fundamentals of Lean Manufacturing. Manufacturing Engineering, 144(1), 54-59.