Each OveliThub case study is written the same way: the situation the client was in, the constraint that made it hard, the approach we took, what we actually built, and what changed afterwards.
They are project records rather than advertisements, which means some of them describe work that was smaller or slower than it first looked.
Where a result depends on a figure we cannot independently verify, we describe the change instead of publishing a number. That is a deliberate choice.
A case study that quotes an impressive percentage nobody can trace is worth less to you than a plain account of what was done and why.