In what circumstance would an addendum be necessary?

An addendum is necessary when clarification of specifications is required because it serves as an official document that modifies or clarifies the original bid documents. This ensures that all bidders have the same understanding of the project requirements and specifications, which is essential for maintaining fairness in the bidding process. If the original documents are unclear or if there are misunderstandings about certain aspects, an addendum can provide the needed details, modifications, or answers to questions raised by prospective bidders. This fosters a transparent bidding environment and helps prevent disputes later in the project.