𝗪𝗵𝘆 𝗱𝗼 𝘄𝗲 𝗻𝗲𝗲𝗱 𝗺𝘂𝗹𝘁𝗶𝗽𝗹𝗲 𝗱𝗲𝗳𝗶𝗻𝗶𝘁𝗶𝗼𝗻𝘀 𝗳𝗼𝗿 𝗮𝘃𝗮𝗶𝗹𝗮𝗯𝗶𝗹𝗶𝘁𝘆, 𝗮𝗻𝗱 𝗵𝗼𝘄 𝘀𝗵𝗼𝘂𝗹𝗱 𝘁𝗵𝗲𝘆 𝗯𝗲 𝗰𝗮𝗹𝗰𝘂𝗹𝗮𝘁𝗲𝗱? Tool availability is something that people in fabs pay attention to every day. But, as with most things related to fabs, when we dig into the definition of availability, we find hidden complexity. After discussing availability with our customers, we identified a need for two different versions of the numerator for the availability calculation, and two different versions of the denominator. The variations in the numerator depend on whether time that a tool is up but being used by engineering (to perform experiments or recipe-level quals) counts as available time. The variations in the denominator depend on whether we use total time or operations time (which excludes non-scheduled time). These two versions of numerator and denominator result in four definitions, each of which may be relevant for different needs. Read the latest FabTime Cycle Time Newsletter article by Dr. Jennifer Robinson for more details: https://xmrrwallet.com/cmx.plnkd.in/ebUzhUYn #Semiconductors #CycleTime #SmartManufacturing #Innovation #FabTime #WaferFabs #IndustrialEngineering #FabPerformance #MetricsStandardization #IntelligentSensorSolutions
