Every litigator understands that expert witnesses play a key role in litigation, especially when dealing with construction issues. Expert testimony at trial can be a deciding factor in persuading a judge or jury in your client’s favor. It is so important that, as parties get closer to trial, litigators often spend considerable time filing motions to limit or disqualify certain aspects of expert testimony in an effort to gain an advantage at trial. Because experts are a key aspect of the trial process, it is important to understand the various rules governing use of expert testimony, primarily Rule 702 of the Federal Rules of Evidence.

On December 1, 2023, amendments to Rule 702 of the Federal Rules of Evidence went into effect which added the language in underline below and removed the language which is crossed out:

Rule 702. Testimony by Expert Witness

A witness who is qualified as an expert by knowledge, skill, experience, training, or education may testify in the form of an opinion or otherwise if the proponent demonstrates to the court that it is more likely than not that:

(a) the expert’s scientific, technical, or other specialized knowledge will help the trier of fact to understand the evidence or to determine a fact in issue;

(b) the testimony is based on sufficient facts or data;

(c) the testimony is the product of reliable principles and methods; and

(d) the expert has reliably applied expert’s opinion reflects a reliable application of the principles and methods to the facts of the case.