Analysis system and analysis method

An analysis method executed by an analysis system including a calculation unit, a storage unit, and an input and output unit, wherein

• the storage unit stores record information related to operation time of an activity for producing a product, and threshold information for determining whether the activity for producing the product is abnormal based on the operation time,
• the analysis method comprising:
• a procedure in which the calculation unit extracts combinations of a facility and a period of time from the record information and generates a case having a case ID for each of the combinations;
• a procedure in which the calculation unit determines the operation time and non-operation time for each generated case, wherein the calculation unit determines, for each generated case, time of an activity that adds value to the product as the operation time and other time as the non-operation time;
• a procedure in which the calculation unit determines abnormality for each case based on the operation time for each case and the threshold information;
• and
• a procedure in which the calculation unit outputs information of comparing the operation time of a case determined to be abnormal with the operation time of a case not determined to be abnormal to the input and output unit,
• wherein the calculation unit calculates a similarity between a case to be analyzed and a reference case to be compared with the case to be analyzed based on the record information, and outputs information indicating the calculated similarity to the input and output unit.