development plans and provide the informat .i'on on thP. socia' and cul~ tu.-at forces in the rural communit if.!5 which he,ps t.he planners ~~~ assessing the social feasibility of development measures. III. ~UANTITATIVE PlANNING PROC EDU~ES Formalized o..-quantitative planning procedur .-~s are basea on th~ use of quantitative models; the structure and equations of which aim at reproducing d part or the totality of the economic real. ities and mechanisl'ls. One can rouqh1y aist:in guish three types of rnoaels accord ­ inq to their utiliz: at.i<ill: forecasting. simu1at ion and investment anal·~ ysis models. There is no strj~t dichotomy bet~een forecasting and simutatton models. and they may often be used fa~ both purposes with onty minot'" modifications; in qeneraJ9 however. simulat ion models are more disaggregated than forecasting ones. tnv·estment analysis mod-ele; are focusseo on a sinqJe micro-ec onomic dct~vaty; thus the level o~ disaggregation hef""e is ma><i mum. In fact. the I eve I of di. saqgf'egat ion of a model is one of the det:erminant factors for the definition of dc:lt~ requir ements. but, in gener-al, because th~ realism of mathema t·-­ icaf pnJgramming models depends more than anything else on the rjchness of choice and levet of detatts incorporated in the possibil­ities. these p1dnning proceaures are more <1em.anoang than the {1) One of these documents was pYepdred for the Expert Consulta­ tion on Socio-Econorllic Tnrfi~ators for Monitoring and Evaluation of Agrari·an Reform and Rural Oevelop .ment in the Near E.asty held at Tunis in . .June 1982 .. 4 -'5 - non-quantitative pr-ocedl]res in terms of quantity and qual.it-; of the data. To htghlight the data requirements of the formalized planning procedures ·• two agric:u1tu.-a1 models will be presented here" one us~<J in project anatysis and the other one used for national plannfng. ~.!._!b~_g£Q1~£1_!!~l§_~!l!!!Y~is _~!}Q2.l~~!~!.i2!LQ!.Q9~me_!.Q.~lli 
**Analysis**
The text appears to be discussing the planning and development of rural communities, with a focus on agricultural reform and rural development. The language used is technical and emphasizes the use of quantitative models in planning processes. The text also mentions the need for rich and detailed data to support these models. Based on these factors, it seems likely that the text is related to the field of economic development, particularly in the context of agriculture and rural development.

**Category**
Economic development, Agriculture, forestry and fishing