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The paper presents a comparison of methodological approaches to creating tender calculations in engineering companies focused on the production of metal sheet parts and welded constructions. The compared methodologies of tender calculations are divided into a manual conventional approach and an automated approach. The conventional methodology is based on a practical approach to the creation of tender calculations by specific companies. The automated approach is performed through a prototype of the online calculation application Aurendi. The calculation is performed by both mentioned approaches on selected types of drawings of metal sheet parts and welded constructions to achieve the relevant research results. The drawing documentations were carefully selected to require a wide range of technological operations necessary for producing the parts. The list of key technological operations is based on laser cutting, bending on a bending press, straightening, welding, grinding, surface treatment and other smaller workshop operations. Raw materials, fasteners and logistics operations associated with the production of the parts are included in the price of purchased items. A crucial point in the creation of the calculation is a selection and acquisition of a suitable type of material considering the prescription in the drawing documentation. The subject of the research is to determine the percentage of time savings using the automated methodology offered by the Aurendi in comparison with the conventional approach. A part of the research output is the time data necessary for creating the tender calculation as well as the calculated prices for both compared approaches.

Keywords: Tender calculations, mechanical industry, metal sheet parts, welded constructions, pricing

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