Today’s drilling industry uses different types of rigs (multi-stand, rack and pinion) where different levels of mechanization help rig personnel with certain tasks such as making/breaking tubular among others. The question arising is which type of rig, in combination with the well to be drilled, and the processes taking place is most efficient. This specifically relates to material flows and workflows which take place. In this thesis the material flows (tubular, mud, material etc.) and work steps in dif-ferent – so called “work centres” will be analysed with the objective to optimize such flows and processes ending up with minimum waiting times and a continuous flow of material. The main reason is to avoid “Invisible Lost Time” and “Non Productive Time” par-ticularly for parallel processes; this makes it necessary to come up with a better rig layout, improved logistics and communication paths, as well as better interaction between crew members. Furthermore this thesis is aiming for a better rig organization. This means that the quality of the Tool Pushers job needs to be improved; therefore the concept of administration software for drilling rigs is presented.