Count the transactional functions to determine their contribution to the unadjusted function point count 5. There are five basic function types internal logical files ilf, external interface files eif. In this article, dan demonstrates the use of fpa in agile development through a handson example. A part of an example is taken from fetcke thomas fetcke, a warehouse software portfolio a case study in functional size measurement, report no. Portfolio analysis in rportfolio analysis in r econ 424cfrm 462 eric zivot summer 2014 updated.
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. Portfolio analysis is a webbased workspace designed for portfolio managers to help monitor their portfolio and make better investment decisions. Function point analysis fpa function point analysis is a method of estimating the size of a project by considering the input and output elements that are in the project and consolidates each type of operation into data or transaction function. In summary, the function point technique provides an objective, comparative measure that assists in the evaluation, planning, management and control of software production. In the example considered above, diversification has helped to reduce risk. Before we dig too deep into this lesson, lets first start with defining more indepth what a business portfolio analysis is. This is a critical point and one of the greatest values of function point analysis. The assessed size is expressed in function points and is utilised as an input within a wide range of. With this in mind, the objectives of function point analysis are to. Most practitioners of function point analysis fpa will probably agree that. An introduction tutorial to function point analysis, or fpa. Measure functionality that the user requests and receives measure software development and maintenance independently of. Measurement practices for successful software projects learn more buy. This session describes the technique of counting function points to determine application size, including presentatio n of basic counting rules, a sample count, and.
Function point analysis is applicable to a subset of adaptive maintenance function point analysis should not be used to size perfective or corrective maintenance work. This presentation focuses on function point analysis as. Illustrative example of a function point analysis for the nasa crew. This process seems to be working out very well for us organization wide. Function point analysis with case studies slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Objectives of function point analysis alvin alexander. How to determine your application size using function points by. It is not enough to examine only maintenance, but one must examine the ratio of maintenance hours to size of the application to get a true picture. An eq permits display of current employee information. Pdf source code based function point analysis for enhancement. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. Weve been using function point analysis fpa estimation for new software development projects and medium sized changes that involves development efforts for code involving database entities as well where we plug in eif, ilf, ei, and eq information. Case study function point analysis form a team of 2 to 4 students.
Application development with function points an example for estimating the time needed to develop an application for stock control system comparison of two applications how to compare two applications complexity regardless of programming language theyre. If you continue browsing the site, you agree to the use of cookies on this website. Identify the counting scope and application boundary 3. Adding fpa to your software development portfolio is also very easy. The portfolios and programs were reorganized to form the portfolio and program hierarchy and efficient portfolio structures, utilizing peoplesoft tree functionality. How to determine your application size using function points. In addition to meeting the above objectives, the process of counting function points should be. This metric can be used to track maintenance hours per function point.
For example, to achieve their strategic objective of new product development to compete effectively in the market could be a portfolioprogram. Sample portfolio analysis the next several slides are a sneak peak of what you will see in a cscu portfolio analysis. An ilf consisting of employee information can be updated with eis that create employee information, delete an employee, or update employee information. In an earlier article, dan horvath explored some history and definitions of agile and how function point analysis fpa can be used in the measurement of agile projects.
Documents are only necessary for assisting the analyst to facilitate the visual mapping process for the program with a manager or engineer a high level architecture, design specifications, and. Function point analysis is an internationally used industry standard technique for assessing the size of an existing software application or of the new or enhanced software to be delivered by a project. A structured technique of problem solving, function point analysis is a method to break systems into smaller components, so they can be better understood and analyzed. Sample reallife uses of function points in organizations.
Every optimal portfolio invests in a combination of the riskfree asset and the market portfolio. Mixing enhancement work with maintenance work can be expedient o r. Dont read into this example that building a software application is like building a house. Function point analysis fpa is a method of functional size measurement. The evolution of three variants of function point analysis. The end result is a single number called the function point index which measures the size and complexity of the software product. Function points are used to compute a functional size measurement fsm of software. The size of projects used to be computed using the kloc kilo lines of code. Function point analysis can be performed with as manyfew of these documents as are available. Although the first two steps are very important in setting the groundwork for your count, and specifying the scope of your count, they are usually performed very quickly, and it is the third step that really takes the majority of the fpa time, and is the heart of the count. Most practitioners of function point analysis fpa will probably agree that there are three main objectives within the process of fpa. This book describes function point analysis and industry trends using function points.
Pricing via functional size a case study of a companys portfolio. Objectives of fpa function point analysis measures software by quantifying the functionality the software provides to the user based primarily on logical design. A pdf portfolio contains multiple files assembled into an integrated pdf unit. A measure which represents the functional size of application software.
Function point analysis measures software by quantifying the. What are our alternatives to function point analysis for. In this example, a fictitious software manufacturer whs sells to its clients applications for warehouse. Function point counts at the end of requirements, analysis, design, code, testing and implementation can be compared. Function point analysis can provide a mechanism to track and monitor scope creep. Measure software by quantifying the functionality requested by and provided to the customer. The function point count at the end of requirements andor designs can be compared to function points actually delivered. An equity fund is a mutual fund that invests principally in stocks. The data arising from the portfolio analysis are objective and can therefore be helpful in gaining from both management and customers support for proposed change. For any given value of x the problem described in this section requires the. Pdf after two external benchmarks, the software applica tion support. Function point analysis quantifies and assigns a value to the actual uses, interfaces, and purposes of a piece of sw.
The files in a pdf portfolio can be in a wide range of file types created in different applications. These are elementary processes in which derived data passes across the boundary from outside to inside. The size of projects used to be computed using the kloc kilo lines of code, but cannot be applied before the project is complete as the prediction models were far from being accurate, but the concept had. It can be actively or passively index fund managed. Function point analysis wiki function point analysis. In this example, when function point counts for sprint one and sprint two are added together, they will equal the total projects and application s function points, which in this case is twentyfive. High risk of failure of their function point counting program and the loss of the investment made in training and counting due to the frustration of the counters being unable to easily manage, reuse, audit or report counts function points dont risk it with a spreadsheet. Determine the number of components ei, eo, eq, ilf, and elf ei the number of external inputs. A generalized structure for function point analysis abstract 1. P invests in the same risky assets as the market portfolio and in the same proportions. It measures the logical view of an application as compared to measuring the physically implemented view or the internal technical view.
The function point analysis estimation methodology validates the individual elements and the related groups to arrive at a complexity level of high, medium and low and assigns a function point count for each subset. It assesses the functionality delivered to its users, based on the users external view of the functional requirements. Pdf function point analysis is a well known established method to estimate the size of software. Pdf application portfolio management, the basics how much. The cost in dollars or hours of a single unit is calculated from past projects. Let p be the optimal portfolio for target expected return 0. Count the data functions to determine their contribution to the unadjusted function point count 4.
To budget the annual maintenance costs of the application portfolio. Dan emphasizes that the definition of the project is critical to this process. When to use portfolio analysis provides essential information to underpin recommendations for the development of the category strategy. Toppings are read from another application kitchen. It is not enough to examine only maintenance, but one must examine the ratio of maintenance hours to size of the application. Measure functionality that the user requests and receives measure software development and maintenance independently of technology used for implementation. Ifpugs method for function point analysis is an i so standard and must be. Written for both information technology it practitioners and managers, it describes how to use this proven. The original files retain their individual identities but are assembled. For example, a pdf portfolio can include text documents, email messages, spreadsheets, cad drawings, and powerpoint presentations. The following shows two options for the pizza selection screen.
A part of an example is taken from fetcke thomas fetcke. A simplified model for portfolio analysis 279 01 02 3 3 v b2 i e figure 1 the slope of the boundary at the point must be x. Function point analysis fpa is a proven and a reliable means to estimate the size of software projects. In an example library database system, enter an existing patrons library card number. Illustrative example of a function point analysis for the. For example, i n function points a bookstore which have no. Function point analysis fpa a standard method for measuring software development and maintenance from the customers point of view function point count fpc the function point measurement of a particular application or project. A business portfolio analysis is essentially a process of looking at a. Function point analysis can be used to determine whether a tool, an environment, a language is more productive compared with others within an organization or among organizations. It also adjusts these values depending on the complexity of the program. Measurement practices for successful software projects is a comprehensive presentation of the principles of function point analysis fpa and a guide to its effective use in managing the development and deployment of software. Use portfolio analysis realtime data, charts, and news to help make decisions on buying and selling securities in your portfolio. Software sizing and productivity with function points.