Joe McNamara & Charles (Business Improvement Group, LLC., Towson, Maryland, USA) Protzman 
One-Piece Flow vs. Batching [PDF ebook] 
A Guide to Understanding How Continuous Flow Maximizes Productivity and Customer Value

Although batching often appears more efficient than one-piece flow for individual tasks, the practice creates waste for other parts of the organization that more than offset its perceived benefits. A silent productivity killer, batching is an extremely difficult mindset to overcome and, as a result, numerous Lean initiatives have been destroyed by