Take off Materials Vs Bill of Materials

Yes.

The main difference for me is that my company does not use or refer to the MTO.

But wikipedia says: http://en.wikipedia.org/wiki/Material_take_off

Definition used by the ISA (International Society of Automation):
A Material Take Off (MTO) is the process of analyzing the drawings and determining all the materials required to accomplish the design. We then use the material takeoff to create a bill of materials (BOM). Inspection does not aid in creating a bill of materials. Procurement and requisition are activities that occur after the bill of materials is complete.
Reference: Whitt, Successful Instrument and Control System Design, ISA Press, 2004.

That definition was useless.

Just as useless as the term?

Does this mean, take the materials off the drawing and create a BOM from them?

I've been involved in mechanical design at some level since 1978 and I've never heard of a whatever it was.

Almost sounds like something to drive your bush hog. No, that's PTO.

Anyway, a good cad program does this automatically.

I'm wondering if our OP is actually looking for Material Take Off, as in a quantity survey done to prepare a price offer.

Take Off Materials sounds like scavenged parts.

The Take off Materials are what is needed to complete the job, whereas the Bill of Materials includes the additional quantities required to re-do the boss's house, complete the quantity surveyor's house extension, and build a granny flat for the building inspector's mother.

Material Take Off will have much more information on it. To calculate cost of the job. It could have the weights of the individual steel beams. This is to know what equipment will be needed to lift it. This type of information is not usually necessary on a bill of material. But is necessary to calculate the cost of equipment in to a bid.

In my field of shipbuilding, a material takeoff was a "ballpark" figure used for estimating purposes. It would represent an accuracy of 20% of actual material needed. The BOM is used by the engineering department to define the actual amount of material used.

In my experience, a BOM accounts for the individual pieces of material used in an assembly (e.g., 12 pcs. 2" Sch 40 pipe x 40"). A material take-off (MTO) consolidates all similar pieces (e.g. 40ft of 2" S40 pipe). Terms may vary by local custom, so there probably isn't one standard answer.

In my world, an MTO is a list of the major parts, say steel beams in various cost groups, or different diameters of rebar. A BOM is a list of everything, individual beam lengths etc. down to the nuts and bolts and washers.