As stated before, unsuitable designs are frequently reported as a common reason of failure. System design relies often upon engineers with a limited comprehension of the science of RAS.
Furthermore, the data provided by the managers are calculated optimistically, so designs may not be realistic. The results from Table 2 showed that it is notable that there is a similarity
between problems caused by equipment, design and RAS system installers/designers. 70% of the systems designed by an external or separate company had problems at some point, whilst none of the farms designed by the final operators reported equipment failures. As reported by the surveyed participants, consultancy support after the implementation of RAS system, from an independent designer, is not as good as is needed (conclusion, 60% of the companies confirm
not having an adequate after-sales assistance and support). This is endorsed by the interviewed consultants, who say that many suppliers promise consultancy support availability after selling the product but, in reality, this is limited. Therefore companies need to pay high fees for advice and problem solving