MBE OR DBE? Considering LKAB’s large future investments and the need for extensive system development, the question arises of which working methodology is best suited to achieve the desired goals in an efficient manner. The total investment cost of up to SEK 400 billion clearly indicates that extensive system analyses are required to minimize risks and incorrect choices along with the ambition to develop world-unique, new and relatively untested technology. A method for describing how the choice of document- or model-based working methods affects a system’s lifecycle cost has been developed (Madni & Purohit, 2019). Here, the following three key parameters are identified as decisive for which methodology should be used: 1. System complexity 2. Environmental complexity 3. System lifespan System complexity is based on the number of components, the interplay between components, the need for skills to develop the system, and the amount of information required to describe the system. Environmental complexity is defined by the number of stakeholders, regulations, and applicable standards and requirements. The third parameter, system lifespan, is considered low if the lifespan is 0 to 1 year, while a lifespan of 30 years or more is considered high. By assessing and classifying all three key parameters as “low”, “medium” or “high” for a number of different industry segments, the industries most likely to benefit from the implementation of MBSE could be identified. For the industrial segment “Natural Resources” (LKAB), all three key parameters were classified as “high”, which is in concurrence with the general perception within LKAB. Analysis with the described method shows that it is probably favorable to implement and use MBE-MBSE at LKAB.
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