**4.1 Identification, goals, and boundaries**

A model can be set up and operated to assess or evaluate sustainability of OPP in Indonesia empirically, objectively, measurably, quantitatively, and accurately to measure the effects of OPP on quality of S-L-E. This model is targeted to be able to produce information on: 1) evaluation on S-L-E qualities, 2) potential productivity of oil palm, 3) factors that are constraining to the growth and production of oil palm, and 4) direction for management recommendations to increase productivity, maintain and improve the quality of S-L-E and preventing the damage and degradation of S-L-E.

The issue that the model hopes to address is doubts about sustainability of OPP regarding the degradation of S-L-E. Regarding the limitation of this model, this model is only to assess the sustainability of OPP in terms of physical and environmental resources, not to assess sustainability of the economic and social aspects.
