The accounting of the "Percentage-of-completion method" is always haunted by shadows of "fraud".
Anyhow, the company must continue understanding the "True progress" because sales and cost will be recorded in accordance with the "progress". Of course, it is fine with the "Construction progress calculated from the incurred costs" which is figured out from the "Incurred costs" and the "Initial estimate", if it had been progressing as expected as in the Initial estimate. You cannot have all of the project go as you expected, whoever you are, a General contractor or System Integrator...
In fact, it would inevitably occur a "bogged-down project" that shows no sign of the completion of the construction work until 100% or 150% or even 200% of its progress. After the quagmire revealed, the real progress wouldn't be unchanged even how hard the Board of Directors discussed.
The following Business Process is a very simple "Progress Report process".
The most notable point is to let more than one person to report the "Construction progress in subjective". At the maximum of four people who are concerned in the project will make "Report" in this example of Business Process. However, as the flow of the business, it starts with the nomination of rapporteurs by the Accounting (or the Audit) department. Therefore, it can be said "Progress SURVEY process".
If many of the concerned people consider that 'Remaining schedule is a half, yet the progress is about 10%', you will make modifications on the accounting at an early stage. That's what it's all about.
[Progress Report process]