BOM = bill of material, seems you are working for

a real estate developer or a construction company. Punchlistis a list of minor items which the contractor needs to modify/correct before turning the property to the owner. long lead refers to the commodity that are not readily available off the shelf, the procument dept has to order these items ahead of time so that the commodity can be delivered to site on time when they are needed for installation. Take-off usually means the estimated quantity of material. ......