gets the number of positions where no worker has been found to be able to work concode_field_sep Double workLoadSD concode_elem_sep Worker undefinedWorker concode_elem_sep Long undefinedPositionsNb concode_elem_sep HashBasedTable<LocalDate,String,Position> positions concode_elem_sep HashMap<Integer,Long> workLoads concode_elem_sep Double meanWorkLoad concode_field_sep double getMeanWorkLoad concode_elem_sep double getWorkLoadSD concode_elem_sep Long getWorkLoad concode_elem_sep HashBasedTable<LocalDate,String,Position> getPositions
long function ( ) { return undefinedPositionsNb ; }