You did not say what industry or profession you are working in.
What I am offering below relates to the Process Plant (Refinery, etc) engineering and design. Specifically the Piping material documents and activities.
This is a copy of a previous question and my answer.
MTO, BOM & BOQ
The question:
What is the meaning of MTO, BOM and BOQ and how do I start this ..... I
mean some useful tips to make a BOM, MTO, BOQ...like what are the things to be
considered, what all are mandatory... etc. ?"
My answer: (Based on my experience)
MTO means Material Take-Off. This is the action of counting of the pieces
and parts needed to fabricate, purchase and or construct something. ("Have you started the MTO yet? - Have you
completed the MTO yet?")
BOM means Bill of Material. This is normally a listing of only the material
shown on an individual specific drawing such as a piping Isometric. ("Have you checked all the BOM's for the Area
10 Isometrics?)
BOQ means Bill of Quantity (also
called Material Summary). This is the
totaling of all the quantities from all the BOM's from all the piping drawings to send
to a piping supplier for pricing or purchase.
Despite of how we describe it, there is basically no difference between MTO (Material Take Off) and BOM (Bill of Materials). They are used synonymously in the project work for material procurement. In some projects, MTO is used dominantly over BOM, while in other project it is the other way around. These are the documents which contains the list of materials of the project including the material description, vendor (supplier) name, part number, quantity etc. Generally individual MTO's (or BOM) are prepared separately for each category of materials such as Cable MTO, Piping material MTO, Bulk Material MTO etc. MTO's (or BOM) are prepared from the detail design document and they are the first document for the procurement initiative.
- MS
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"All my technical advices in this forum must be consulted with and approved by a local registered professional engineer before implementation" - Mohammed Samad (Linkedin Profile: http://www.linkedin.com/in/msamad)
Bill of materials (BOM) is a list of the raw materials, sub-assemblies, intermediate assemblies, sub-components, components, parts and the quantities of each needed to manufacture an end item (final product) .
Material Take Off (MTO) is a term used in engineering and construction, and refers to a list of materials with quantities and types (such as specific grades of steel) that are required to build a designed structure or item. This list is generated by analysis of a blueprint or other design document. The list of required materials for construction is sometimes referred to as the Material
Take Off List (MTOL).
Material take off is not limited to the amount of required material, but also the weight of the items taken off. This is an important factor when dealing with larger structures, allowing the company that does the take off to determine total weight of the item and how best to move the item (if necessary) when construction is completed.