While relatively rare, errors and omissions discovered just prior to or during the bidding process may be so egregious they cause major disruption. For example, construction documents may specify equipment that cannot be installed or maintained because proper clearance and/or space and/or access have not been provided, or the documents may omit to provide adequate space for piping, electrical and fire protection equipment and materials. Sometimes, problems result from a failure to coordinate, such as when no one has made arrangements to relocate personnel, equipment and/or utilities in an area scheduled for demolition and construction.