dual models application of interval data envelopment analysis for interval data (case study: butchery units of zabol city, iran)

in this research, interval efficiency of butchery units of zabol city using model of interval data envelopment analysis was measured, and factors of effective on it was studied. data for this research obtained via completing questionnaires and use of method of sampling randomized for 2010 years. the results showed that efficiency maximum of 50% of butcheries is less than 40% and efficiency minimum of 80% of butcheries is less than 20%. average of efficiency minimum and maximum is 13.5% and 47.2% respectively. also interaction effect of variables was studied on average of extensions efficiency. the results of linear regression with method of square minimum showed that each one from variables of experience, studies and zabol sheep race had significant and positive correlation with efficiency. with due attention to low efficiency of butchery units of zabol city and consumers emphasis to see slaughter was suggested establishment of livestock sale units with slaughter units under control of hygiene and health department, and also establishment of meat hygienic distribution units with complete equipment’s in city exits. moreover since manager’s experience has much effect on efficiency of butchery units, so increase of young manager’s information via education classes regarding marketing and meat grade is necessary.