The choice to opt for more or less advanced solutions takes into account not only performance but also economic factors (for example, to work with steam temperatures particular attention must be paid to the issue of acid corrosion of the pipes in which the steam flows, which increases costs due to a greater thickness of the pipes needed or due to coating them with protective materials such as Inconel, effective against corrosion but very expensive) and management factors (for example, work in more critical conditions may result in the need to increase both the duration and the frequency of ordinary and extraordinary maintenance).