Cycle time variation is a metric and philosophy for continuous improvement with the aim of driving down the deviations in the time it takes to produce successive units on a production line.  It supports organizations' application of lean manufacturing or lean production by eliminating wasteful expenditure of resources.. Although it is often used as an indicator of lean progress, its use promotes a structured approach to reducing disruption that impacts efficiency, quality, and value. ARENA simulation on the other hand Arena is a discrete event simulation and automation software that allow user to builds an experiment model by placing modules (boxes of different shapes) that represent processes or logic. Connector lines are used to join these modules together and to specify the flow of entities. While modules have specific actions relative to entities, flow, and timing, the precise representation of each module and entity relative to real-life objects is subject to the modeller. This study was conducted in the assembly workstation of a headboard, the upper part of every bed with a unique design. This study was done in the AX Furniture, Muar, Johor Darul Takzim using interview, observation on the production department and ARENA simulation. Observations were made by studying each element of motion film recorded by video recorder. The research was done in order to identify the cycle time of the headboard assembly process and to increase the efficiency of the cycle time of the headboard assembly itself. Results from this study may help to increase the efficiency of the cycle time concept in a furniture industry.