Project success includes time, budget, quality, customer satisfaction etc. We are always confronted with time and money in the first place. Activity schedules must consider the available resources to be completed in the right sequence and in time. Companies must maintain competitive cost-time profiles. Execution periods of non-critical project activities have a considerable influence to the amount of locked-up capital. In the paper we have simulated some cases with varied execution periods of noncritical project activities within the slack, and measured cost-time investment. For the visualisation of project cost accumulation we have applied cost-time profile; we have used Cost Time Profiler software. The results show that the differences are significant, bringing a potential for project optimization.
At a time when worldwide energy demand grows, the care for greener environment grows as well. Due to the extremely high energy potential, along the safety and cleanness of its operations, the biogas plant as an energy solution is deemed a great investment in the future. Frequently in that regard we face the question concerning the scope of the investment and the time needed for its return. This paper gives an example of an investment in a biogas plant and the exploitation of renewable sources, which is simultaneously an example of circular economy. The biogas plant has a power of 1 MW, which along the existing concession prices and the resulting economy justifies the validity of the decision to invest while ensuring a cleaner environment. Invested funds shall be returned within a maximum of 6 years, reflecting the extremely dynamic business process.
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