The purpose of this research is to present the calculating methodology of equipment efficiency and time availability indices, and also the improvement countermeasures for these related indices by TPM activities. So, this treatise presented a new proposal model capable of calculating the productivity, efficiency, and also reliability indices of equipment. These indices are based on the modified 7 major loss time structure hindering the equipment efficiency. This new proposal model is the calculating methodology for the equipment efficiency indices such as operation rate, time availability, performance efficiency, quality rate, overall equipment efficiency(OEE), net equipment efficiency(NEE), and the equipment productivity indices such as production readiness rate, equipment productivity, total effective equipment productivity (TEEP). And also, this model is to be the easy calculating methodology for the equipment reliability indices such as the time availability based on and composed of MTBF. Finally, this research presented the countermeasures for improving the equipment efficiency and reliability indices by TPM activities.