The rules for calculating the summary sheet score in the scoring process for a building construction safety inspection are fairly straightforward. First, for each sub-item, the actual score (A1) is derived by multiplying the actual score value (C) of the inspection score sheet by the full score value (B) of the item and dividing by 100. The formula can be expressed as A1=B*C/100, which means that the actual score for each item is the ratio of the number of points it deserves to the actual inspection performance.
The total score of the summary table is then simply the sum of the actual scores of all the sub-items. If an item is not inspected but has a corresponding perfect score, the total score is calculated by dividing the actual score of the item that was actually inspected by the sum of the perfect scores it should have received, and then multiplying by 100% to reflect its impact in the scoring.
When dealing with the scoring of multiple pieces of similar equipment (e.g., scaffolding, tower cranes, etc.), the arithmetic mean of their respective scores will be taken to ensure that the scoring is fair. At the same time, no negative values are allowed in the inspection scoring, and the sum of the individual deductions cannot exceed the number of points due for the item. In addition, if the score of a guaranteed item is below the standard (i.e., no score for one item or a subtotal score of less than 40 points), the checklist will not be included in the total score.
The above rules are implemented in accordance with the provisions of JGJ59-99, the safety inspection standard for building construction, to ensure a fair and rigorous safety inspection of the construction process.