Since there are many uncertainties in the future, it is difficult to improve the accuracy of the results in the maintenance plan for buildings even if using a complicated theory or mathematical formula in order to calculate the timing and cost of the maintenance works. On the other hand, the commonly maintenance plans have low accuracy and large deviation from the reality, so it is high possibility that the necessity and importance of maintenance plans may not be recognized by anyone other than an expert.

 Therefore, this paper indicates a method of the maintenance planning for public facilities based on the inspection data and deterioration progress of building elements which was not basically considered in conventional plans for public facilities, and confirmed its validity verification.

 As a result, it became clear that the maintenance plan is more useful than conventional plans in the following 4 points.

 1. The maintenance plan adjusts the timing and cost of maintenance works according to the deterioration status of each building element, so it is possible to plan a highly accurate and realistic maintenance.

 2. Whether the inspection data is reflected, it has been clarified that the total maintenance cost does not change in the long-term. However, it is effective to make a short-term maintenance plan in order to confirm the priority, timing and cost of maintenance works that will be required in the future.

 3. Accounting ordinary repair costs is effective when managing many facilities like a local government, or when a long-term maintenance plan is created to confirm the total maintenance costs in the future.

 4. Visualization of the deterioration progress is effective if creating maintenance plan from the viewpoint of confirming the necessity and the promoting of maintenance works at appropriate times.