3rd rule of agile ERP: focus on value
– “We need a report which groups our sales by product components.”
– “And we need it broken down by cost centers.”
– “And it must show comparison with last month, quarter and year, and with budget and forecast, with indexes and trends. In linear regression.”
– “And it must let you choose if it is by posting date or by document date. Or by shipment date. Maybe some other date as well.”
– “And it must exclude returns, and include only those re-shipments that were linked to original returns in the shown period.”
And it must be a disaster if you agree to half of these.
Agile has been gaining momentum among software development methodologies for past decade or so. Various researches and surveys consistently show that software developed under an agile approach is generally better than the software developed under waterfall approaches.
The 
I’d like to have a