Comment by renewiltord
6 days ago
From the wording of the description of the programmer who failed to debug and labeled it user error it appears that it is fairly typical Accenture-grade software where there is no single bug so much as the program itself approximates the correct result.
Their data model appears to have been akin to having a single accumulator sum up things rather than to use something like double-entry bookkeeping or an account graph so that the source of errors could be traced.
It’s less “a bug” and more a coincidence that the application worked when it did.
So the errors could be down to using floats instead of decimal types?
It could be that. It could be that they just have separate code paths for measuring "amount in" and "amount reported" with an if-clause missing in one and present in the other. From the description the debugging programmer provides, it doesn't look like they had any sort of coherent design.