manufacturing processes also encounter unexpected delays or inoperational time. during periods that a process,line, or machine is idle because of queuing, waiting, breakdown, or failure in logistical support, manufacturing efficiency is negatively impacted. All forms of unexpected delay represent serious bottleneck issues. For example, it is estimated that between 75 and 95 percent of all nonproductive delays result from unplanned queuing in manufacturing processes.Needless to say,most senior managers have little or no tolerance for unexpected production delays that result from late or damaged arrival of critical materials or components. logistical delay on the part of a supplier who provides parts or materials can result in manufacturing failure to meet planned output. A firm's strategic impact is directly affected by leadtime performance. As a general rule, firms that compress manufacturing leadtimes and control or eliminate unexpected performance varianc exhibit greater flexibility to accommodated customer requirements while simultaneously enjoying low-cost manufacturing.