The dissertation thesis deals with valuation of individual items in the economic balance sheet of a stand-alone company and subsequently as a part of acquisition. We define the economic balance sheet as a full set of assets, liabilities as well as synergies amongst the assets (stand-alone company view) and companies (transaction view), where the sum of their individual valuations has to equal to the overall value of the company. Hence we suggest that the management (and a valuer) should be able to decompose the company value into defined and controllable value components. Apart from identifying optimal methods for the individual valuation, the key for achieving this task is the internal (amongst the assets) as well as the overall consistency (vis-a-vis the overall company value). Compared to the overall-valuation approach, we demonstrate how the component approach can lead to more precise results, higher management discipline and accountability, and can serve as a tool for an a priori identification of overpayment as well as an instrument for controlling the value post transaction. We defined two primary types of synergies in terms of valuation approach - Enhancement, improving current income potential and Future opportunities, mainly focusing on new projects - and proposed appropriate valuation approaches given their specifics. Since a large proportion of valuations on individual level is based on the income approach, setting a clear and consistent approach to discount rates was a vital part of the work. We propose a primary and, if not available, second-best rate for each component of the economic balance sheet. Although the synergies are probably of the highest commercial interest, the liabilities with external source of risk and deferred taxes on the individual level are areas generally neglected both by academics and practitioners. While the first one will have only but crucial impact on companies with decommissioning and similar liabilities, the latter is present almost in any itemized valuation, and its incorrect or purely isolated application affects the overall result and breaks the link to the overall company value. We analyze both topics and offer consistent valuation methods, although further research is required to refine them. We discuss WARA as one of the key tools for ensuring consistency of itemized valuation of the economic balance sheet. Lacking any theoretical background and interest from academic researchers, we first analyze simple concepts of the tool as they are used in practice and point out observed conceptual errors, oversimplifications and accounting-only approach. Not only that we propose complex consistent rules for WARA construction but we extend the concept from the focus on conventionally defined net assets to the full economic balance sheet, which is the only way how to relate the itemized valuation to the overall company valuation. Finally, we presented a case study based on real-life example which demonstrated practical applicability of proposed partial solutions as well as the overall approach to achieving consistency with the total company or transaction valuation. Although the analysis of individual items of the economic balance will be inevitably based on subjective assumptions to an extent, we have shown that proposed complex and consistent approach adds value to the strategic and transaction considerations. Also the preciseness of the tools will increase with the number of transactions performed as the parameters get calibrated.