Park while at the software engineering institute and others developed a framework for defining sloc values. The sum of all 14 degrees of influences will give the tdi. 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. Measuring loc and other basic measurement seminar on software cost estimation, ws 200203.
Estimation techniques function points tutorialspoint. Function point analysis fpa and source lines of code loc methods are two common, and. Software engineering project size estimation techniques. In function point analysis, is there any relationship between loc. Explain problem based estimation model in software. Of course seer for software will work with any definition, as well as the many.
Sloc is typically used to predict the amount of effort that will be required to. Scale varies from 0 to 5 according to character of complexity adjustment factor caf. Difference between cohesion and coupling tabular form. Good management cannot guarantee ppjroject success. Software engineering software process and project management. It is a process which defines the required functions and their complexity in a piece of software in order to estimate the softwares size and scope upon completion. 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. Note that defining and documenting the user requirements in a concise and unambiguous manner is the first major step to achieve a highquality. Dsi delivered source instructions it is used in cocomo81 as kdsi means thousands of delivered source. Creative the difference between salieri and mozart. 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. Both fp and loc are units of measurement for software size. In the software development process, requirement phase is the first software engineering activity. Systems engineering differs from other engineering.
Function points fp vs lines of code loc programming. Function point analysis was developed first by allan j. Software measurement page, software size, loc, function. Lines of code is a software used to measure the amount of code in a software program. Software engineering functional point fp analysis javatpoint. An article on gotdotnet discusses two common metrics for measuring the complexity of an application. Discuss the strengths and weaknesses to this size measure when compared with the lines of code count.
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. What is the difference between it and software engineering. Fpa is used to make estimate of the software project, including its testing in terms of functionality or function size of the software product. Capers jones publishes relationships between loc and fp for many languages. Software engineering is about building, maintaining and evolving software systems. Software engineering functional point fp analysis with software engineering tutorial, models, engineering, software. Seer fbs in the table refers to seers function based sizing. Although same principals are used in both cases, solving these problems requires different procedures. One of my standard questions what is a function point got an odd stare. Project and process metrics in software engineering. 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. In the past few years, the practitioners trend has been to get away from sloc and sdi, and to work based on function points.
This phase is a userdominated phase and translates the ideas or views into a requirements document. What changes in systems development affect software cost estimation. Difference between structured analysis and structure. What is the difference between the known risks and predictable risks. Software size estimation theory of function point fp software engineering classes. Function point fp is an element of software development which helps to approximate the cost of development early in the process. Use the 14 general characteristics of a system to find the degree of influence of each of them. Software cost estimation using function point with non. Function point estimation is used to estimate the effort or calculate the cost of. The major difference between dsi and sloc is that a single source. Lines of code versus function points versus use cases for sizing. Loc is typically used to predict the quantity of effort that will be neded to develop. 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.
Cs8494 question bank software engineering cs8494 qb iq notes. Seerfbs in the table refers to seers function based sizing. What is difference between line of code and function point. Difference between forward engineering and reverse. Difference between product and process version control in project. Albrecht initially developed function point analysis in 1979 at ibm and it has been further modified by the international function point users group ifpug. 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. What is difference between math model and regression equation, and how computational model is formulated. The process of measuring the time period of software development makes a difference between small and large projects because of different factors to consider. Function points fp vs lines of code loc by harryobas.
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. Person month is a measurement unit for effort in software engineering. It has the same name, but totally different from that one. The loc measure is used to measure size of the software. 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. It may measures functionality from users point of view. As requirement of staff varies time to time in the development so there is not constant no of people is there to work.
We will examine the major changes which have been taking place in recent times. Lines of code sloc, number of functions to perform, and other cost drivers. Lines of code and function points were described as measures from which productivity metrics can be computed. Estimation techniques function points a function point fp is a unit of. Presentaion on loc matric and function point matric for software engineering. Line of code loc matric and function point matric slideshare. But avoid asking for help, clarification, or responding to other answers. As the name suggest, loc count the total number of lines of source code in a project.
A function point fp is a component of software development which helps to approximate the cost of development early in the process. Loc and fp data are used in two ways during software project estimation. 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. Thanks for contributing an answer to software engineering stack exchange. However, bad management usually result in project failure. 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. Software engineering stack exchange is a question and answer site for professionals, academics, and students working within the systems development life cycle. During the study of a structure reinforced concrete, steel etc. The software is delivered late, costs more than originally estimated, and flfails to its. Loc and fp based estimation, cocomo model brainkart.
Most parametric estimation models such as cocomo accept size expressed in either fp or loc as input. But 100 person does not mean, work effort put by 100 person in one month or 1 person in 100 months. Software engineering by saikat dutt, chandramouli geetha chandramouli. Explain iterative waterfall and spiral model for software life cycle and various activities. It estimates the amount of exertion that is needed to develop a program. Software projectplanning size estimation lines of code loc if loc is simply a count of the number of lines then figure shown below. Lines of code versus function points versus use cases for. Software engineering calculation of function point fp.
142 487 1524 617 934 962 236 77 1114 130 492 250 484 937 521 263 1514 1324 1279 1216 277 1212 1429 1305 627 935 632 771 613 570 1396 535