Avoidable Lost Time is a proactive Key Performance Indicator (KPI). Historically, the industry has a need for a metrics that proactively measure time wasted on the critical path. Avoidable Lost Time (ALT)™ is a new, unique measurement that represents the totality of elapsed time from first proactive watch of an evolving hazard, until the watch condition is corrected, or the event actually occurs, plus the time to return to the critical path of the well plan.