The document provides steps and guidelines for calculating function points for a system. It explains that function point counting involves identifying the number of external inputs, external outputs, external inquiries and internal logical files and external interface files, and determining their complexity based on factors like file and transaction types and records and determinants. The document then provides complexity matrices and formulas to calculate the unadjusted function points, adjusted function points based on a value adjustment factor, and efforts based on productivity. It also defines key terms used in function point analysis.

1. Rohit Sinha

2. A person who counts FP looks at a system
as mentioned below

3. Function point Calculation Steps
• Identify the count of EO,EQ,ILF,EIF.
• For each ILF and EIF, identify the number of RETs and DET’s.
• For each EI,EO,EQ identify the no of FTRs and DET’s.
• Compute the total unadjusted function points.
• Determine the 14 GSCs for TDI calculation.
• Determine the Efforts from the formulas.

4. How to identify
• Words to notice while FP calculation:
EI EO EQ
Add Browse Adjust
Allocate Display Export
Modify Enquire Generate
Assign Extract Notify
Remove/Change/Reset List pick Print
Create/Delete List view Report
Set/Undo/update Inquire Summary

6. EI Complexity Matrix
FTR’s 1-4 DET’s 5-15 DET’s 16+ DET’s
0-1 LOW LOW AVERAGE
2 LOW AVERAGE HIGH
3+ AVERAGE HIGH HIGH

7. EO and EQ Complexity Matrix
FTR’s 1-5 DET’s 6-9 DET’s 20+ DET’s
0-1 LOW LOW AVERAGE
2-3 LOW AVERAGE HIGH
3+ AVERAGE HIGH HIGH

8. ILF and EIF Complexity matrix
RET’s 1-19 DET’s 20-50 DET’s 51+ DET’s
1 LOW LOW AVERAGE
2-5 LOW AVERAGE HIGH
6+ AVERAGE HIGH HIGH

9. Function Point Counting Weights
TYPE LOW AVERAGE HIGH TOTAL
EI _*3 _*4 _*6 =
EO _*4 _*5 _*7 =
EQ _*3 _*4 _*6 =
ILF _*7 _*10 _*15 =
EIF _*5 _*7 _*6 =

10. Formulas

11. Calculations
• UFP = UFP(Data)+UFP(Transaction)
• AFP = UFP* VAF
• VAF = 0.65 + (.01* TDI)
• EFFORTS = AFP*Productivity

12. Terms Explained
• UFP = Unadjusted Function Points
• AFP = Adjusted Function Points
• VAF = Value Adjustment Factor
• TDI = Total Degree of Influence
• RET- calculated for the Data Function(ILF/EIF)
• FTR- calculated for the Transaction
Function(EI/EO/EQ).

13. Terms Explained
• TDI is calculated based on the 14 GSC’s(General
System Characteristics) on a scale of 0-5.

14. S.No Complexity Adjustment Factor TDI
1 Data Communication 0-5
2 Distributed Functions 0-5
3 Performances 0-5
4 Heavily utilized operational Environment 0-5
5 Transaction Rate 0-5
6 On-line data entry 0-5
7 Design for end-user efficiency 0-5
8 On-line master update 0-5
9 Complex processing 0-5
10 Code Reusability 0-5
11 Installation ease 0-5
12 Operational ease 0-5
13 Multiple sites 0-5
14 Ease of change 0-5

15. Seller Buyer
t
ADD,MODIFYA
INVENTORY
REPORT
INFORM
ORDER TO
SELLER
PLACE
ORDERS
ADD TO CART
DISPLAY
ITEMS
SEARCH
ITEMS
DELETE ITEM
ITEM
MASTER(ILF)
CART
ORDERS
Financial systemTAX RATES
Shopping Portal

16. Income Tax
Reports-
includes several
Calculated
fields........
EO
Employee
EMP No.
Dept No
Name
Basic Salary...
ILF
Employee Detail
Dept No XXXXX
Emp# Name Sal
A01 AAAA 12
P54 PQRS 32
..... ....... ...
..... ....... ...
EQ
EI
Tax Rate
Tax Slab
Tax Rate
.........
.............
................
EIF
Other ApplicationApplication Boundary
USER 1
USER 2

17. Practical Example
• Counting Radio alarm clock
• Inputs(EI’s) Outputs(EO’s/EQ’s)
Set time, Set alarm, Set Alarm, Sound, Display time
type of alarm, Set volume,
St am/pm, Set snooze,
Set On/Off alarm.
• Internal Logical files(ILF)
Time data(alarm data/ time data)
Radio data
• External Interface File(EIF’s)
Radio frequency