| Case Name |
The result in the execution of the public sewerage business which construction expenses was high because of erring in the integration of the drain laying construction cost. |
| Pictograph |
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| Date |
1993 |
| Place |
The Saitama Prefect. Sayama City. |
| Location |
The city office. |
| Overview |
Since the soil construction cost was appropriated redundantly in the integration of drain laying construction cost, it became high, when the branch line of the sewerage was constructed. Therefore, government subsidy equivalent \ 2827,000 which concerned this was considered unreasonable. |
| Incident |
Laying construction of the sewage pipe is constructed by drilling the city road, and burying the centrifugal reinforced concrete pipe of 250 mm in inner diameter, and this drain laying construction cost was separetely calculated of material cost of the drain, excavation and back filling of the road and cost for the waste disposal, cost for earth retaining works of the reclaimed surface, etc. based on integration standard enacted by the Saitama Prefect, and it came up to \ 25844,915 in total of these.
However, the integration of the drain laying construction cost was not appropriate as follows.
The soil construction cost within the drain laying construction cost had been calculated totals \ 6821,682 at the beginning and it was discovered in the process to reexamine the integration content that there was a error within it, and it was corrected to \ 7112,733. However, in erring, when the drain laying construction cost is totaled, the amount of not only the cost after the correction but also that of the beginning has appropriated redundantly. As the result, the drain laying construction cost became \ 6821,682 ( the soil construction cost of the beginning ) higher than \ 19023,233 by right. |
| Sequence |
The assistant industry of laying of sewage drain extension 346m and installing of 14 manholes for constructing the branch line of the sewerage, etc. was carried out at \ 59740,000 ( government subsidies \ 29870,000 ) construction expenses.
At the beginning the soil construction cost within the drain laying construction cost had been calculated totals \ 6821,682.
It was discovered in the process to reexamine the integration content that there was a error at the cost for disposal of waste soil, etc., and it was corrected to \ 7112,733.
In erring, when the drain laying construction cost is totaled, the amount of not only the cost after the correction but also that of the beginning has appropriated redundantly.
As the result, drain laying construction cost became \ 6821,682 ( the soil construction cost of the beginning ) higher.
Government subsidy equivalent \ 2827,000 which concerned this was considered unreasonable. |
| Cause |
It is considered that it was caused by the carelessness of the integrator. In addition, it seems to be also one of the causes that they couldn't systematically realize the failure without reviewing the integration thoroughly. |
| Countermeasures |
When the integration book is made, it is necessary to review it many times, and that it is made with attention of many people. And it is also necessary to systematically establish staffs for the review separalety from the intrgrator. |
| Scenario |
| Primary Scenario
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Misjudgment, Misperception, Regular Movement, Wrong Movement, Possible Damage, Potential Hazard
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| Sources |
The 1993 fiscal year settlement inspection report ( Board of Audit ).
|
| Financial Cost |
Government subsidy delivery amount considered unreasonable : \ 2827,000. |
| Field |
Civil Engineering
|
| Author |
MIYAKI, Yuya (The University of Tokyo)
KUNISHIMA, Masahiko (The University of Tokyo)
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