It is a serious problem for the people who has habit to tell a lie, how to cover up the mistake after saying stupid excuses with blaming others. There is a country called Spain. They have a proverb like "Una mentira,decientotira". It means if you tell a lie without sufficient care, you will have to tell lies hundred times to cover up the original lie. We also have something similar in Japan and I think it is very correct. Sometimes careless lie will make others very angry. In many cases, we can find some better ways to solve the problems, and it is not necessary to tell a lie.
It is important to take various environmental factors such as contour, shading objects, and the climate of the site into account for advanced PV plant design. We can use numerical simulation software such as PVsyst for design comparison.
However, it is not good to trust the simulation result too much without taking other factors such as material costs, personnel expense, and cabling loss. Because we need to keep in mind that basically all the numerical simulations overestimates the shading effect. Some people tend to push less efficient design with only the justification by the slightly better simulation result. But I am afraid it is even less advantageous as a result of higher cost and less (or tiny increase) of production.
We have developed a PV design support tool shown in the picture below to improve our design efficiency. Thanks to the tool, we can compare the use of DC cables for different designs in very short time. It enabled us to make a quantitative design change proposal quickly without compromising any reduction of PV production for customers and profits for construction people.