To provide an analysis apparatus capable of improving the accuracy of analysis results. An analysis apparatus makes predictions about the quality of conditions of a production facility or the quality of conditions of a production object in a process of producing a crankshaft as the production object by a grinder as the production facility. The analysis apparatus includes the plurality of predictors making predictions about the quality by using different analysis methods based on data concerning the production facility, a selection unit selecting the plurality of predictors in use from the plurality of predictors, and an overall predictor calculating a comprehensive prediction result about the quality based on the plurality of prediction results obtained by the plurality of predictors in use selected by the selection unit.
Please help me write a proper abstract based on the patent claims. CLAIM: 1. An analysis apparatus making predictions about the quality of conditions of a production facility or the quality of conditions of a production object in a process of producing the production object by the production facility, comprising: a plurality of predictors making predictions about the quality by using different analysis methods based on data concerning the production facility; a selection unit selecting the plurality of predictors in use from the plurality of predictors; an overall predictor calculating a comprehensive prediction result about the quality based on a plurality of prediction results obtained by the plurality of predictors in use; and a prediction accuracy calculation unit calculating accuracies of predictions made by the respective plurality of predictors based on prediction results made by the respective plurality of predictors and inspection results about the quality, wherein the selection unit selects the plurality of predictors in use from the plurality of predictors based on prediction accuracies calculated by the prediction accuracy calculation unit. 2. The analysis apparatus according to claim 1, wherein the prediction accuracy calculation unit transmits data concerning the prediction accuracies to the selection unit, and the selection unit selects part of predictors from the plurality of predictors as the plurality of predictors in use, and replaces the already selected part of predictors with other predictors having higher prediction accuracies than the part of predictors based on data received from the prediction accuracy calculation unit. 3. The analysis apparatus according to claim 1, wherein the plurality of predictors in use include at least two or more predictors which make predictions by different analysis methods based on the same analysis object data concerning the production facility. 4. The analysis apparatus according to claim 1, wherein the plurality of predictors in use include at least two or more predictors which make predictions based on different analysis object data concerning the production facility. 5. The analysis apparatus according to claim 1, wherein the overall predictor calculates a comprehensive prediction result after performing weighting to the plurality of prediction results obtained from the plurality of predictors in use in accordance with the prediction accuracies calculated by the prediction accuracy calculation unit. 6. The analysis apparatus according to claim 1, wherein the analysis apparatus sets parameters used for predictions by the respective plurality of predictors again based on newly acquired data concerning the production facility. 7. The analysis apparatus according to claim 1, wherein the overall predictor calculates a comprehensive prediction result based on data concerning environment in which the production facility is arranged or data concerning a use state of the production facility. 8. The analysis apparatus according to claim 7, wherein the prediction accuracy calculation unit performs weighting so as to largely reduce the prediction accuracy when a production object determined as a good product in the prediction result is determined as a defective product in the inspection result at the time of calculating prediction accuracies of the respective plurality of predictors as compared with a case where a production object determined as a defective product in the prediction result is determined as a good product in the inspection result. 9. The analysis apparatus according to claim 8, wherein the analysis apparatus sets parameters used for predictions by the respective plurality of predictors again based on newly acquired data concerning the production facility. 10. The analysis apparatus according to claim 8, wherein the overall predictor calculates a comprehensive prediction result based on data concerning environment in which the production facility is arranged or data concerning a use state of the production facility. 11. An analysis apparatus making predictions about the quality of conditions of a production facility or the quality of conditions of a production object in a process of producing the production object by the production facility, comprising: a plurality of predictors making predictions about the quality by using different analysis methods based on data concerning the production facility; and an overall predictor calculating a comprehensive prediction result about the quality based on a plurality of prediction results obtained by the plurality of predictors, wherein the plurality of predictors include at least two or more predictors which make predictions by different analysis methods based on the same analysis object data concerning the production facility. 12. The analysis apparatus according to claim 11, further comprising: a prediction accuracy calculation unit calculating accuracies of predictions made by the respective plurality of predictors based on prediction results made by the respective plurality of predictors and inspection results about the quality, wherein the overall predictor calculates a comprehensive prediction result after performing weighting to the plurality of prediction results by the plurality of predictors in accordance with the prediction accuracies calculated by the prediction accuracy calculation unit. 13. The analysis apparatus according to claim 12, wherein the prediction accuracy calculation unit performs weighting so as to largely reduce the prediction accuracy when a production object determined as a good product in the prediction result is determined as a defective product in the inspection result at the time of calculating prediction accuracies of the respective plurality of predictors as compared with a case where a production object determined as a defective product in the prediction result is determined as a good product in the inspection result. 14. The analysis apparatus according to claim 12, wherein the analysis apparatus sets parameters used for predictions by the respective plurality of predictors again based on newly acquired data concerning the production facility. 15. The analysis apparatus according to claim 11, wherein the overall predictor calculates a comprehensive prediction result based on data concerning environment in which the production facility is arranged or data concerning a use state of the production facility. 16. An analysis system comprising: a first analysis apparatus which is the analysis apparatus according to claim 1; and a second analysis apparatus which is connected to a network so as to perform data communication with the first analysis apparatus, wherein the second analysis apparatus is set so as to make predictions about the quality by using auxiliary predictors not corresponding to predictors in use among the plurality of predictors and calculates the accuracies of predictions made by the auxiliary predictors, and the selection unit replaces part of already selected predictors as predictors in use with auxiliary predictors having higher prediction accuracies based on the prediction accuracies of predictors in use calculated by the prediction accuracy calculation unit and prediction accuracies obtained from auxiliary predictors calculated in the second analysis apparatus. 17. The analysis system according to claim 16, wherein the second analysis apparatus includes the plurality of auxiliary predictors, and the analysis system determines predictors preferentially making predictions among the plurality of auxiliary predictors based on predetermined conditions by the second analysis apparatus. 18. The analysis system according to claim 16, wherein the analysis system sets parameters used for predictions by the respective plurality of predictors provided in the first analysis apparatus and the second analysis apparatus again based on newly acquired data concerning the production facility.