Solution : https://service.sap.com/sap/support/notes/529729 (SAP Service marketplace login required)
Key words :
menu path edit -> execute forecast, attached source code corrections, terms material forecast, schedule lines tab, user parameter mm_fcst_round, function 'material_forecast_dialog' reason, related note 521579 corrects, forecast values, related notes 350555, transaction md62
Related Notes :
| 546064 | Missing user parameter MM_FCST_ROUND |
| 521579 | MD70 Forecast value rounded up in demand management |
| 502897 | Forecast: Rounding strategy in Transaction MM02 and MPxx |
| 350555 | Matl forecast:flag for specificatn of rounding cat. |