Давайте подумаем, что могло привест

Давайте подумаем, что могло привести к рассмотренной выше проблеме:1. Требования к продукту изменились во время разработки;2. Масштабирование системы привело к недостаточности производительности;3. Изначально неверно оценили потребности создаваемой системы в производительности или функциональности генератора отчетов;Я столкнулся во всеми этими, скажем типичными, проблемами.

Результаты (английский) 1:

Let's think about what could cause the problem discussed above:
1. the product requirements change during development;
2. Scaling the system led to a performance failure;
3. Initially misjudged the need to create a system performance or functionality of the reporting tool;
I encountered in all of these, say typical, problems.

Результаты (английский) 2:

Let's think about what could have led to the problem discussed above:
Product requirements changed during development;
2. Scaling the system has led to poor performance;
Initially misestimating the system's performance or report generator functionality;
I've encountered all these, let's say, typical problems. ...

Результаты (английский) 3:

Let's consider what might cause these problems:
1. Product requirements change during development;
2. System scale leads to insufficient productivity;
3. The initial error estimates the system's requirements for the performance or function of the report generator;
I've encountered all these, say, typical problems.