Most firms lose work before anybody has assessed the merits
Ask a managing partner where the firm loses work and you will hear about fee pressure and competition. Look at the intake record, where one exists, and the answer is usually duller. A person called on Thursday afternoon, spoke to whoever answered, was told somebody would call back, and nobody did. Another sent an email to a partner who was in court for two days. A third had a matter in a practice area nobody at the firm routed properly, so it drifted between two lawyers being polite to each other.
None of that involves losing on merits or on fees. It is administrative loss, and it is invisible because nothing was ever recorded. Which is why an intake routine, which sounds like the least interesting thing a firm could implement, is usually the change with the largest effect on the volume of work it takes on.