Productivity is an essential element in achieving good production competitiveness. Companies need to know where their productivity levels are. Productivity measurement is instrumental at the management level in doing strategic planning. Objective Matrix (OMAX) is a partial productivity measurement system used to monitor Productivity in each part of the company with productivity criteria according to the existence of that part (Objective). The measurement of Productivity using the OMAX method also involves the AHP method in determining the weight of each ratio. Based on the calculation of Productivity in the period January - August 2020 using the Objective Matrix Method, the results obtained that the productivity values below the average productivity values are the period in March (-15%), April (-39%), May (-1%) and July (- 65%) 2020. Then from the results of calculations with OMAX for the period January-August 2020, the achievement scores of each ratio were analyzed using the TLS method and calculated the index of achievement scores against standard productivity scores. The calculation results show that three ratios get a score below the standard. Ratio 1, Ratio 2, and Ratio 5 get an index of achievement score against the standard score of 88% (ratio 1 and 2) and 75% (ratio 5). The five why analysis of the three ratios shows four root causes of the low productivity score of ratio 1, ratio 2, and ratio 5. After further research with the 5W+1H method, it was found that recommendations for improvement that can be done are to increase the supervisory function in production, updating SOPs, conducting job evaluations and training, as well as scheduling machine maintenance

Keywords : Objective Matrix, OMAX, Analytic Hierarchy Process, Traffic Light System, Why why Analysis, 5W + 1H