Seerfbs in the table refers to seers function based sizing. It was an attempt to overcome difficulties associated with lines of code as a measure of software size, and to assist in developing a mechanism to predict effort associated with software development. Lines of code sloc, number of functions to perform, and other cost drivers. Systems engineering differs from other engineering. Software engineering calculation of function point fp. Function point analysis fpa and source lines of code loc methods are two common, and. Source lines of code sloc, also known as lines of code loc, is a software metric used to measure the size of a computer program by counting the number of lines in the text of the programs source code. Without ppproper ppg,lanning, a software development project is doomed. Most parametric estimation models such as cocomo accept size expressed in either fp or loc as input. What are current trends in software cost estimation. As the name suggest, loc count the total number of lines of source code in a project. Explain iterative waterfall and spiral model for software life cycle and various activities.
Loc and fp data are used in two ways during software project estimation. Direct approach source lines of code sloc is a software metric used to measure the size of a software program by counting the number of lines in the text of the programs source code. Sloc is typically used to predict the amount of effort that will be required to develop a program, as well as to estimate programming productivity or maintainability once the software is. Person month is a measurement unit for effort in software engineering.
Presentaion on loc matric and function point matric for software engineering. In the software development process, requirement phase is the first software engineering activity. Use the 14 general characteristics of a system to find the degree of influence of each of them. Line of code loc matric and function point matric slideshare. What changes in systems development affect software cost estimation. Lines of code versus function points versus use cases for sizing. Software engineering stack exchange is a question and answer site for professionals, academics, and students working within the systems development life cycle. Both fp and loc are units of measurement for software size. Software size estimation theory of function pointfp. Seer fbs in the table refers to seers function based sizing.
This phase is a userdominated phase and translates the ideas or views into a requirements document. Lines of code versus function points versus use cases for. As requirement of staff varies time to time in the development so there is not constant no of people is there to work. Estimation techniques function points tutorialspoint. In function point analysis, is there any relationship between loc. Lines of code is a software used to measure the amount of code in a software program.
Cs8494 question bank software engineering cs8494 qb iq notes. I am now using a tool named jamait is not a javabased mathematical package. But avoid asking for help, clarification, or responding to other answers. Park while at the software engineering institute and others developed a framework for defining sloc values.
Line of code metric lloc matric is a software metric used to measure the size of a computer program by counting the number of lines in the text of the programs source code. What is the difference between it and software engineering. Comparative analysis between fpa and cocomo techniques for software cost estimation abu baker ali moftah a thesis submitted in fulfillment of the requirement for the award of the degree of master of computer science software engineering faculty of computer science and information technology. Software size estimation theory of function point fp software engineering classes. What is the difference between the known risks and predictable risks. One of my standard questions what is a function point got an odd stare. The sum of all 14 degrees of influences will give the tdi. Software projectplanning size estimation lines of code loc if loc is simply a count of the number of lines then figure shown below. The major difference between dsi and sloc is that a single source.
Function points fp vs lines of code loc programming. Scale varies from 0 to 5 according to character of complexity adjustment factor caf. In the past few years, the practitioners trend has been to get away from sloc and sdi, and to work based on function points. It may measures functionality from users point of view. Function point estimation is used to estimate the effort or calculate the cost of. The loc measure is used to measure size of the software. Good management cannot guarantee ppjroject success.
The size of a software that is subject to development is required in order to come up with accurate estimates of effort, cost and duration of a software project. Function point analysis was developed first by allan j. In software engineering, methods like structured analysis and structured design are considered to be fundamental tools for systems analysis, especially for analyzing all the requirements of a business and for developing the required specifications that convert practices into programs, configurations of the hardware and other manual processes. Sloc is typically used to predict the amount of effort that will be required to. Thanks for contributing an answer to software engineering stack exchange. The software is delivered late, costs more than originally estimated, and flfails to its. Capers jones publishes relationships between loc and fp for many languages. A function point fp is a component of software development which helps to approximate the cost of development early in the process. Creative the difference between salieri and mozart. Discuss the strengths and weaknesses to this size measure when compared with the lines of code count.
Software engineering by saikat dutt, chandramouli geetha chandramouli. Dsi delivered source instructions it is used in cocomo81 as kdsi means thousands of delivered source. But 100 person does not mean, work effort put by 100 person in one month or 1 person in 100 months. Albrecht initially developed function point analysis in 1979 at ibm and it has been further modified by the international function point users group ifpug. Although same principals are used in both cases, solving these problems requires different procedures. Software cost estimation using function point with non. The process of measuring the time period of software development makes a difference between small and large projects because of different factors to consider. Loc is typically used to predict the quantity of effort that will be neded to develop. Project and process metrics in software engineering. Measuring loc and other basic measurement seminar on software cost estimation, ws 200203. Explain problem based estimation model in software.
Difference between product and process version control in project. Estimation techniques function points a function point fp is a unit of. Difference between forward engineering and reverse. Software engineering functional point fp analysis javatpoint.
However, bad management usually result in project failure. Note that defining and documenting the user requirements in a concise and unambiguous manner is the first major step to achieve a highquality. Difference between cocomo 1 and cocomo 2 comparison. The basis of the measure loc is that program length can be used as a predictor of program characterictics such as effort and ease of maintenance. Fpa is used to make estimate of the software project, including its testing in terms of functionality or function size of the software product. Software measurement page, software size, loc, function.
We will examine the major changes which have been taking place in recent times. Difference between cohesion and coupling tabular form. Software engineering assignment help, explain lines of code loc, lines of code loc is a software metric used to calculate the size of a software program by counting the number of lines in the text of the programs source code. Software engineering is about building, maintaining and evolving software systems. Difference between structured analysis and structure. During the study of a structure reinforced concrete, steel etc. Software engineering project size estimation techniques. Data communications, distributed data processing, performance, heavily used configuration, transaction rate, online data entry, enduser.
It estimates the amount of exertion that is needed to develop a program. What is difference between math model and regression equation, and how computational model is formulated. Source lines of code sloc, also known as lines of code loc, is a software metric used to measure the size of a computer program by counting the number of lines in the text of the programs. Software engineering software process and project management. It has the same name, but totally different from that one.
Function points fp vs lines of code loc by harryobas. What is difference between line of code and function point. Of course seer for software will work with any definition, as well as the many. Function point fp is an element of software development which helps to approximate the cost of development early in the process.
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