input process does notupdate or maintain any FTRs (Internal Logical Files orExternal Interface Files) and theoutput side does notcontain derived data. Rating:Like all components,EQs are rated and scored. Basically, an EQ is rated (Low, Average orHigh) like an EO, butassigned a value like and EI. The rating is based upon the totalnumber of unique (combined unique input and out sides) data elements (DETs) andthe file types referenced (FTRs) (combined unique input and output sides). DETsand FTRs were discussed in an earlierchapter. If the same FTR is used on both the input and output side, then it is countedonly one time. If the same DET is used on both the input and output side, thenit is only counted one time. ________________________________________________________________________ INTERNAL LOGICALFILES (ILF) - a user identifiable group of logically relateddata that residesentirely within the applicationboundary and is maintained through External Inputs. An internallogical file has the inherentmeaning it is internally maintained, it has some logical structure andit isstored in a file. Rating:Like all components, ILFs are ratedand scored. The rating is based upon the number of data elements (DETs) andthe record types (RETs). DETs and RETs were discussed earlier. The tablebelow lists both the level (low, average or high) and appropriate score (7, 10or 15). After definitions, here it goes howcalculation is finally done: Numberof function points: FP = UAF * VAF Where:UAF = Unadjusted Function PointsVAF = Value Adjustment Factor Unadjusted function point iscalculated based on the numbers of elements.multiplied by Component weight. Use Case Point The estimations calculation starts from definition of theuse cases under of a given requirement or implementation part.For each Use Case, it is necessary to map how manytransactions are there.Transaction mapping is not that easy task and is the core ofthis method, since variations here will imply big total effort variation.Transaction MappingDepending on the number of transactions, Use Case will bedefined with a certain complexity.Total Use case weightfactor (UCWF) is calculated from number of use cases from Certaincomplexity. This will bring estimation to a certain Total unadjusted Actor weight factor (AWF), that is a result of multiplication of weight related to specific type of Actor and thenumber of actors of each type.Continuing the estimation process, now, it is important toadd application factor, called Totaltechnical factor (TTF)Unadjusted use casepoints (UUCP) = AWF + UWCFOnce more, given factor is to be multiplied by the weight.Factors are to be added in TTF, Total technical fator.The following formula is to be applied:Technical Complexity Factor (TCF) =0.6 + (0.01 * TTF).At thisstage, we will start adding team productivity characteristics, for calculation ofwhat is called Environment factor (EF)Total Use Case, then, are calculated:UCP = UUCP * TCF * EF According Karner, the author if this methodology, typically,one UCP corresponds to 15 mhrs up 20 mhrs, which means that the effort for oneUCP execution is to be inside this range.The exact value will be determined by Productivity factorwhich is a historical info. This is to be a benchmarking. For eachorganization, this is related with a given technology.Productivity factor is given in the following Unit:UCP/PersonDaySo, (number of UCPs/Productivity Factor) *8 provides Total effort,