The majority of the  food companies are  on the way to work outsteps, the interrogation on the  concept   of  security  is  not  new,   it  exists  since  the  origins  of   humanity  but  was accentuated  as  of  the  advent  of  the  industrial  era.  To  control the  industrial  risks,  one consequently developed many systems and safety measures active of the simple sensitizing until  the  most  complex  systems  of  prevention  and  intervention,  amongst  other  things  the instrumented  system  of  security  .So  undeniable  progress  was  recorded,  the  results  in security seem to reach a threshold which requires, to be crossed, a true taking into account of  the  human  factors  and  organizational.  Moreover,  if  the  interest  of  the  companies    for  the  security  is  perpetual,  the  current  context  remains  largely  marked  by,  on the  one  hand,  the  strong  technical  culture  available  to  these  companies  ;  in addition,   the   negligence   of   the   human   factors   and   organizational ,   and   yet   all   the industrialists agree to regard the man as a probable factor of error and/or as a primary cause of the major accidents: more than 70% of the industrial accidents are due to a human error a Though  there  are  several  causes  which  could  explain  the  negligence  of  the  human  factors and  organizational  ,  we  believe  that  the  main  cause  consists  of  the  scarcity  of  practical  and simple  methods  which  can  be  applied  even  by  technicians  no  according  to  the  statistics  of the major accidents. Though there are several causes which could explain the negligence of the human factors and organisational, we believe that the main cause consists of the scarcity of  practical  and  simple  methods  which  can  be  applied  even  by  technicians  no  specialists  in the  human  factors.  Nevertheless,  these  methods must  be  ready  to  determine  these  factors in   particular   the   human   one   in   all   its   complexity   and   all   its   dimensions   (physics, psychological,   cultural,   religious,   etc.)   like   its   work   environment,   its   formations   and qualifications.      Beyond  these  causes,  we  make  the  general  assumption  here  that  the adaptation  of  a  method  evaluation  of  the  performance  of  the  human  barriers  of  security jointly  to  the  other  mainly  technical  methods  could  bring  us to  an  exhaustive  evaluation  of the performance of the safety fences. Use font size 11 for the abstract text. It should not be exceeding 200 words.