Adjustment of a deviation of an axis position of driving unit of machine tool

An adjustment necessity determination device that makes a determination, after a workpiece is machined, about a necessity to make an adjustment of a deviation of an axis position of each axis of a machine tool that has performed the machining, the adjustment necessity determination device comprising:

• a data acquisition unit configured to
• receive at least one of first data relating to a drive unit of the machine tool from the machine tool or second data from a sensor in the machine tool, and
• based on the received at least one of the first data or the second data, acquire a parameter relating to a cause of a deviation of the axis position of each axis of the machine tool,
• the parameter being acquired at a time of the machining;
• a time-series data storage unit configured to receive and store the parameter as time-series data;
• and
• an adjustment necessity judgement unit configured to make a judgment about a necessity to make an adjustment of a deviation of the axis position of each axis of the machine tool based on the time-series data of the parameter stored in the time-series data storage unit.