Each pyramid building, as any big project, goes through the same life cycle of design, planning, execution, and delivery. And throughout each of these phases, a continuous tuning is going on, a complex project is called so for a reason. A software system is not different in this respect. We design, plan and build it, then change and tune continuously. If we are lucky, then the new changes do not go too far back to the initial stages and do not require changing the design. To hedge against such drastic steps, we use prototypes (if the waterfall model is used) or iterative delivery (if the agile process is adopted) for early detection of possible problems. Like young parents, we are always on alert, monitoring the progress of our child, day and night.
As we mentioned already in one of the previous sections, there are several diagnostic tools that come with each JDK 9...