Time study techniques
WF Workfactor, aside from the original method, there are other variants in loop like RWF Ready WorkFactor and VWF Accelerated WorkFactor.
MTM1 Methods Time Measurements is the most detailed method nowadays and consists of 400 codings. It is international accepted.
MTM2 combined MTM1 data through statistical simplication to get to mere 39 codings.
UAS was initially developed for batch production processes, but is now averted to all domains.
SAM is a swedish MTM1 derivated system MTMSD standaard data system, which flourishes nowadays.
MEK another derivative, applicable for small batch work.
LCW/VREX system that is oriented around object handling, not human actions
Lesser-used systems include MOST and MODAPTS, mainly in US but not in Europe.