What is function point counting?

What is function point counting?

Function point counting calculates a single value, which represents the total amount of functionality being delivered by an application. Size is then communicated as a stand-alone value or segmented to display information regarding specific software components.

How is FP count calculated?

1. Cost Estimation.
2. For each function identified above the function is further classified as simple, average or complex and a weight is given to each.
3. FP = total UFP * (0.65 + (0.01 * Total complexity adjustment value)) or.
4. FP = total UFP * (Complexity adjustment factor)

How is TDI calculated in function point?

Function point = FP = UFP x VAF VAF = Value added Factor i.e. 0.65 + (0.01 * TDI) , TDI = Total Degree of Influence of the 14 General System Characteristics. Thus the function points for the project will be 672. Checkout this article for a detailed walk-through into function-point calculations.

What is FP count?

FP Counting Process involves the following steps − Step 1 − Determine the type of count. Step 2 − Determine the boundary of the count. Step 3 − Identify each Elementary Process (EP) required by the user. Step 4 − Determine the unique EPs.

What is function point metrics?

Function point metrics provide a standardized method for measuring the various functions of a software application. It measures the functionality from the user’s point of view, that is, on the basis of what the user requests and receives in return.

What is function point explain the use of function point?

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. Function points are used to compute a functional size measurement (FSM) of software. The cost (in dollars or hours) of a single unit is calculated from past projects.

What is DET and RET?

DET – Data Element Type is a unique user recognizable, non-repetitive field. FTR – File Type Referenced is a file type referenced by a transaction. An FTR must also be either an Internal or External file. RET – Record Element Type is a user recognizable sub group of data elements within an Internal or External File.

Where is Caf in function point?

1. Step-1: As complexity adjustment factor is average (given in question), hence, scale = 3.
2. Step-2: CAF = 0.65 + ( 0.01 * 42 ) = 1.07.
3. Step-3: As weighting factors are also average (given in question) hence we will multiply each individual function point to corresponding values in TABLE.

How is size in function point metrics?

Beside using the number of the input and output data values function point metric computes the size of a software product(in unit of function points or FPs.)

How are function points derived?

A function point value for a system is derived by summing and weighting counts of five features of the system: inputs, outputs, queries, logical files, and interfaces to other systems. To add these counts together, there must be models that can convert the counts to a common unit.

How do you find the metric function point?

Solution:

1. Number of external inputs (EI) * 4 = 96.
2. Number of external outputs (EO) * 4 = 184.
3. Number of external inquiries (EQ) * 6 = 48.
4. Number of internal files (ILF) * 10 = 40.
5. Number of external interfaces (EIF) Count-total →

What is ILF and EIF?

Internal Logical Files (ILF). These are tables that are maintained (eg, updated) by the application. External Interface Files (EIF). These are tables that are only referenced by the application.

What is cosmic function point sizing?

COSMIC is an international standard for measuring software size: ISO/IEC 19761:2011. The COSMIC Function Point sizing method of measuring software requirements is based on two main principles: 1. The ‘Software Context Model’ Software is bounded by hardware and typically structured into layers.

What is the difference between the IFPUG and cosmic function point counts?

The COSMIC function point count generated by ScopeMaster® is an estimate (typically within about 15% of a manual count). whereas the IFPUG estimate is less precise due to characteristics of the methodology itself. ScopeMaster® does the “heavy lifting” of manual function point counting, saving considerable time and effort.

What is the function point count used for?

The function point count provides measurement of software size, which is the sum of the data movements for a given functional requirement. It may be used to estimate (and benchmark) software project effort, cost, duration, quality and maintenance work.

What is cosmic function point (CFP)?

It is a refined improvement over its predecessors (IFPUG and Mark II FP). The unit of size is the COSMIC Function Point or CFP. Once you have measured (or estimated) the size in COSMIC Function Points you can then use this as the base metric to : and more..