Feature point metrics in software engineering

Function points albrecth 1979 is basic data from which productivity metrics could be computed. Feature points pearls of wisdom for agile software. Examples include the effectiveness of defect removal during development, the pattern of testing defect arrival, and the response time of the fix process. Us based worldwide organization of function point analysis metric software users. Feature point includes another measurement parameteralgorithm.

The approach was described for certain types of functionality by ifpug. Another function point extension developed by boeing integrate data dimension of software with functional and control dimensions. Estimation techniques function points tutorialspoint. Its main purpose is to deliver tangible, working software. Yes, but only from the point of view of the business. Feature points are computed by counting the information domain values and are weighed by only single weight.

A software metric is a standard of measure of a degree to which a software system or process possesses some property. You learn more by practice or practically as compared to the only theoretical knowledge or by book reading. Team managers and all members should see the consequences of their work and use this data to improve workflow and increase efficiency. Average time to convert a user from a trial to a paying user. Function point analysis measures software by quantifying the. Along with the increase in software utility, capability, cost, and size there has been a. Estimation of the size of software is an essential part of software project management. Function point fp measure was inadequate for many engineering and. These practices are driven from a clientvalued functionality perspective.

Find all the books, read about the author, and more. Introduction to function point analysis software metrics. Business metrics focus on whether the solution is meeting the market need, and agile metrics measure aspects of the development process. If the application of the program is defined and well understood, the system requirements may be definitive and maintenance due to changing. Sizeoriented metrics are direct measures of software and the process by which it was developed. The function point is a unit of measurement to express the amount of business functionality an information system as a product provides to a user. We can accurately measure some property of software or process. They help software teams monitor productivity across workflow stages, access software quality, as well as introduce more clarity to the development process. The feature point measure accommodates applications in which algorithmic complexity is high. Software size size measurement must reflect effort, cost and productivity. Feature points are computed by counting the information domain values. Function points are used to compute a functional size measurement fsm of software.

Featuredriven development fdd is an iterative and incremental software development process. Software engineering stack exchange is a question and answer site for professionals, academics, and students working within the systems development life cycle. Within the software development process, many metrics are that are all connected. Changes to software that affect the business will also affect these kinds of metrics. A software metric is a measure of software characteristics which are measurable or countable. Process metrics can be used to improve software development and maintenance. Software size estimation theory of function pointfp software engineering classes. Measure software development and maintenance independently of technology used for. Feature points as a unit of sizing of software project. The history of software engineering and software metrics is almost from the same era. It can be used in those areas where there is a level of complexity, is comparatively very high. Feature point is the superset of function point measure that can be applied to systems and engineering software applications.

Fdd blends a number of industryrecognized best practices into a cohesive whole. Because of the abstract nature of software and special problems with software schedule, cost, and quality, data collection and the derived metrics are an essential part of software engineering. It helps the project manager to further predict the effort and time which will be needed to build the project. 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. Software engineering features models, methods, tools. As the name suggest, loc count the total number of lines of source code. The approach was described for certain types of functionality by ifpug method.

Software engineering software maintenance cost factors. Software size estimation theory of function pointfp. The cost in dollars or hours of a single unit is calculated from past projects. A function point fp is a unit of measurement to express the amount of business functionality, an information system as a product provides to a user. Software process and project metrics linkedin slideshare. Feature points are not commonly used as a software estimating technique anymore. Software engineering extended function point efp metrics. Metrics ou should know to nderstand our engineering efficiency 9 how often master is red developers use the master branch as a starting point for all new work. Businesslevel measures of things such as user engagement, close rates, revenue generation, and so on provide feedback on how the business is doing in the real world. Parameter that can be obtained after requirements analysis and that are independent of the specification and implementation language. A software metric is a quantitative measure of the degree a software system, component, or process possesses a given attribute. Quantitative metrics for a release measure the release progress with value delivery number of features delivered to the customer and their total value expressed in feature points, feature debt existing customer commitments, conformance to release date, and technical debt number of refactoring targets and number of refactorings completed. Software metrics massachusetts institute of technology.

Object oriented testing in software testing modern principles of software. Using agile metrics to measure the teams productivity is the key part of agiles philosophy. The function point analysis technique is used to assess the functionality delivered by software and an unadjusted function point ufp is the unit of measurement once you have a function point count, you can use the resultant measure of the software product, either on its own or combine it with other measures to develop the following. Software metrics are measures of the success of a software process. Software metrics help project managers to gain an insight into the efficiency of the software process, project, and product.

There are numerous metrics that product managers can use to measure the success of their product. Even if a metric is not a measurement metrics are functions, while measurements are the numbers obtained by the application of metrics, often the two terms are used as synonyms. Why kpis matter for software engineering pluralsight. Software metrics are valuable for many reasons, including measuring software performance, planning work items, measuring productivity, and many other uses. Software engineering extended function point efp metrics with software engineering tutorial, models, engineering, software development life cycle, sdlc. In theory, metrics can help to improve the development process and provide companies with information that makes future projects more predictable, efficient, etc. No way to measure property directly or final product does not yet exist for predicting, need a model of relationship of predicted variable with other measurable variables. Software engineering covers both function oriented as well as object oriented oo approach and emphasises on emerging areas such as web engineering, software maintenance and component based software engineering. Metrics and models in software quality engineering, second edition, is the definitive book on this essential topic of software development. But both the function point and feature point represents the functionality of the systems. Extended function point metrics the feature point metric counts a new software characteristic algorithms. Ibms development of function point metrics the author was working at ibm in the 1960s and 1970s and was able to observe the origins of several ibm technologies such as inspections, parametric estimation tools, and function point metrics. The feature points are used in those applications in which the algorithmic complexity is high like realtime systems where time constraints are there, embedded systems, etc.

Software engineeringextended function point metrics. If weve never really had any good metrics in software engineering, why was that a problem. A function point extension called feature points, is a superset of the function point measure that can be applied to systems and engineering software applications. Metrics in agile software development can also help a scrumkanban master keep track of their teams wellbeing. This is the single best book on software quality engineering and metrics that ive encountered. It destabilizes the focus on pure elementary process content. Project size estimation metrics function point metrics and feature point metric in software engineering. Free of jargon and assuming no previous programming, development, or management experience, this accessible. This is possible by collecting quality and productivity data and then analyzing and comparing these data with past averages in order to know whether quality improvements have occurred. This is the main source of truth, so if it goes red, it means everyones stuck.

Percentage of users who used a certain product feature. Various measures are used in project size estimation. It is a lightweight or agile method for developing software. Comprehensive in scope with extensive industry examples, it shows how to measure software quality and use. Bang measure defines a function metric based on twelve primitive simple counts that affect or show bang. Endusers and clients can also benefit from the use of agile project metrics that focus on evaluating the result of the product. For the successful software development and maintenance, measurement is a key technology. A complete introduction to building robust and reliable software beginning software engineering demystifies the software engineering methodologies and techniques that professional developers use to design and build robust, efficient, and consistently reliable software. Function point analysis was developed first by allan j. The original formulation for computing the function points uses the count of five different parameters, namely, external input types, and external output types, logical internal file type, external interface file types and external inquiry type. Best 15 agile metrics for software development and testing. Metrics and models in software quality engineering.

Here are a few examples of engagement metrics used by saas companies. Feature points as a unit of sizing of software project management pmp describe feature points as a unit of sizing of software. Software engineering metrics and models benjamincummings series in software engineering by samuel daniel conte author visit amazons samuel daniel conte page. The function point is a unit of measurement to express the amount of business functionality an. Function point matric lfunction points measure software size. Product metrics describe the characteristics of the product such as size, complexity, design features, performance, and quality level. Software metrics has become essential to good software engineering and good software engineering project management, i. There are two types of cost factors involved in software maintenance.

Feature points as a unit of sizing of software project management. There are no standards depicting use of feature points for software estimation. Software engineering project size estimation techniques. The method was first published in 1979, then later in 1983. The goal behind using precise metrics and measurement in software engineering is to identify and control what can affect software development and the project as a whole. Increase the speed and reliability of your team by. Function point fp measure is the subset for the feature point. This course uncovers what software metrics are, why they are used, who should develop the metrics, when they should be applied, who should own the measurements, and what should be.