A method comprising: obtaining a model of an object to be manufactured via subtractive manufacturing; obtaining information comprising: information about one or more machine tools available for manufacturing the object; and information about one or more cutting tools available for use by the one or more machine tools to manufacture the object; identifying , based on the model, a geometric feature to be machined as part of manufacturing the object; accessing a database including strategies for machining different geometric features , the database including a plurality of strategies defining different ways of machining the identified geometric feature; selecting , based on the obtained information, a first strategy which only employs equipment which is currently available at the machining site, and a second strategy involving use of a cutting tool and/or fixture which is compatible with the tool interface, but currently unavailable at the machining site; performing computer simulation for the first and second selected strategies; receiving user instructions responsive to the computer simulation; and providing , based on the user instructions and a strategy of the first and second selected strategies, instructions for causing one or more machine tools to manufacture the object via subtractive manufacturing. obtaining a model of an object to be manufactured via subtractive manufacturing; obtaining information comprising: information about one or more machine tools available for manufacturing the object; and information about one or more cutting tools available for use by the one or more machine tools to manufacture the object; identifying , based on the model, a geometric feature to be machined as part of manufacturing the object; accessing a database including strategies for machining different geometric features , the database including a plurality of strategies defining different ways of machining the identified geometric feature; selecting , based on the obtained information, a first strategy which only employs equipment which is currently available at the machining site, and a second strategy involving use of a cutting tool and/or fixture which is compatible with the tool interface, but currently unavailable at the machining site; performing computer simulation for the first and second selected strategies; receiving user instructions responsive to the computer simulation; and providing , based on the user instructions and a strategy of the first and second selected strategies, instructions for causing one or more machine tools to manufacture the object via subtractive manufacturing. information about one or more machine tools available for manufacturing the object; and information about one or more cutting tools available for use by the one or more machine tools to manufacture the object; identifying , based on the model, a geometric feature to be machined as part of manufacturing the object; accessing a database including strategies for machining different geometric features , the database including a plurality of strategies defining different ways of machining the identified geometric feature; selecting , based on the obtained information, a first strategy which only employs equipment which is currently available at the machining site, and a second strategy involving use of a cutting tool and/or fixture which is compatible with the tool interface, but currently unavailable at the machining site; performing computer simulation for the first and second selected strategies; receiving user instructions responsive to the computer simulation; and providing , based on the user instructions and a strategy of the first and second selected strategies, instructions for causing one or more machine tools to manufacture the object via subtractive manufacturing. <EOS>