The data resides entirely outside the application and is maintained by another application. The external interface file is an internal logical file for another application. Products By Bayt. Use Our Mobile App. Get Fresh Updates On your job applications, and stay connected.
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The value adjustmentfactor VAF is based on 14 general system characteristics GSC's that rate the general functionality of the application being counted.
Each characteristic has associated descriptions thathelp determine the degrees ofinfluence of the characteristics. The degrees ofinfluence range on a scale of zero to five, from no 7. General System Characteristic Brief Description 1. Data communications How many communication facilities are there to aid in the transfer or exchange of information with the application or system? Distributed data processing How are distributed data and processing functions handled?
Performance Was response time or throughputrequired bythe user? Heavily used configuration How heavily used is the current hardware platform where the application will be executed? Transaction rate How frequently are transactions executed daily, weekly, monthly, etc.? On-Line data entry What percentage of the information is entered On-Line?
End-user efficiency Was the application designed for end-user efficiency? Complexprocessing Does the application have extensive logical or mathematical processing? Installation ease How difficult is conversion and installation? Multiple sites Was the application specificallydesigned,developed,and supported to be installed atmultiple sites for multiple organizations? Facilitate change Was the application specificallydesigned,developed,and supported to facilitate change?
Summary of benefits of Function Point Analysis Function Points can be used to size software applications accurately. They can be counted by different people,at different times,to obtain the same measure within a reasonable margin oferror. Function Points are easilyunderstood bythe non technical user.
This helps communicate sizing information to a user or customer. Function Points can be used to determine whether a tool, a language,an environment,is more productive when compared with others. For a more complete listofuses and benefits ofFP please see the online article on Using Function Points.
Conclusions Accurately predicting the size of software has plagued the software industryfor over 45 years. Function Points are becoming widelyaccepted as the standard metric for measuring software size. Now that Function Points have made adequate sizing possible,itcan now be anticipated that the overall rate of progress in software productivity and software quality will improve. Understanding software size is the key to understanding both productivity and quality.
Without a reliable sizing metric relative changes in productivity Function Points per Work Month or relative changes in quality Defects per Function Point can not be calculated.
If relative changes in productivity and quality can be calculated and plotted over time,then focus can be put upon an organ izations strengths and weaknesses. Mostimportant,any attemptto correct weaknesses can be measured for effectiveness. Total views On Slideshare 0. From embeds 0. Number of embeds 5. Downloads 3. Shares 0. Comments 0. Likes 0. You just clipped your first slide! Clipping is a handy way to collect important slides you want to go back to later.
What are sizing techniques? What do you mean by function point metric? How many types of point functions are there? What is a file type referenced? What is RET in software engineering? How do you calculate Function Points? What are the special features of functional point? What is Function Point explain with example? What is the main advantage of function point analysis? How do you calculate the cost of ending inventory?
What is the estimated cost of ending inventory? What are ILF curves? What is the purpose of sizing? Tech Community Register Log in. FaceBook Share. We just need to find what you want, do not need any mathematical formula. In fact, plainly on one, all logical files involved in a processing functions.
The so-called "maintenance", have described earlier in this series of notes in an article last, refers to create, add, modify or delete a ILF.
They can be regarded as the same thing, just different counting rules.
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