To prevent this type of mistake from happening the subcontracted should have made it his first instinct to get in contact with the General contractor and inform him about the sprinkler heads on the fire protection system. The subcontractor should of followed the punch-list as stated. One thing to take into consideration is that the project is in the phase of substantial completion and is suited to be three story office building. The subcontractor is responsible for the mistakes made and will have to pay money to replace each of the heads. Also the contractor should have been there to view what is going on during the time of installation to make sure no problems occur and everything is being followed accordingly to the drawings. This is an example of poor supervision that was conducted by the general contractor. The General Contractor should of look over the fire protection drawings to see if there were any questions about what is shown and should also notify the architect as well. On the architects part, he or she should have indicated which type of system will be used and the type of heads that are to be installed if not noted on the drawings or if it was the architects fault.