Mae Ôl-ffitio er mwyn Optimeiddio yn seiliedig ar ymchwil gydag Ysgol Bensaernïaeth Cymru a'r argymhellion yn 'Cartrefi Gwell, Gwell Cymru, Gwell Byd' a gyhoeddwyd yn 2019. Mae wedi arwain at greu dull llawer mwy soffistigedig a phwrpasol sy'n osgoi problemau'r gorffennol.
ORP is based on research with the Welsh School of Architecture and the recommendations in ‘Better Homes, Better Wales, Better World’ published in 2019. It has led to the creation of a far more sophisticated and bespoke approach that avoids the problems of the past.