Much time is wasted with many legal cases around this issue. Experts are called only to find that other experts were needed as part of the solution process.
Meanwhile the case definition changes and you are chasing your tail!
Time and money is wasted in obtaining expert reports to find that the expert only covered part of the picture.
As a result, legal cases are ill-defined due to the improper assessment of the root causes of building defects.
Often the initial case questions are quickly proved to be inadequate to cover the evidence required.