unquestionably the biggest challenge is dealing with client requests or revisions in the production process or running order close to showtime as one small change can impact a whole range of services supporting it client being clients sometimes ask for what they perceive to be a minor change but they do not understand the complexities of such a request. So another challenge is for the agency to manage the client's expectations in a reasonable way
it can be best described as managing a complex array of specialists egos and personalities who may have no idea of what the other vendor are doing on-site and when. it is best to have a number of work-in-progress meeting and final briefings with all stakeholder prior to as well as during the event particularly during rehearsals as there are always things to improve upon