Example scenario (not a real client case): a manufacturer wants to move quote and order tracking out of spreadsheets into a single-purpose web panel. There are three screens (quotes, orders, reporting), two user roles (sales, management) and one integration (email notifications); no data migration.
The effort estimate is built line by line: analysis and scope writing 4 days, interface design 5 days, development 20 days, testing and go-live 6 days; 35 person-days in total. To show the arithmetic, assume a day rate of TRY 4,000; this is an assumption, not our quote. 35 × TRY 4,000 = TRY 140,000 (excluding VAT), which falls into the 'simple web-based application' band in the table above.
Add a two-way integration with the accounting software and a migration of several years of historical data, and those two items alone can add 15-25 person-days, moving the project up a band. That is why, when you get a quote, you should check whether each line item is in scope before you look at the total.