"FRONT OFFICE AUTOMATION SYSTEM4. RegularExpression Validator5. Custom ValidatorRequired Field Validator:Simple of all, Required Field Validator makes sure that the user enters data into aform. For example, on a registration form you might want your users to enter their data ofin a textbox. If they leave field empty, this validation control will display an error.Notable property of the Required Field Validator is the initial value property, whichset as an initial value in the controlCompare Validator:Comparison Validations are used to compare the data entered by the user into acontrol (Textbox, for example) with the value entered into another control for with aconstant value. We indicate the control to validate by setting the ControlToValidateproperty and if we want to compare a specific control with another control we need to setthe ControlToCompare property,Range Validator:Range Validators are used to test if the value of a control is inside a specificiedrange of values.The three properties of this control are the ControlToValidate property, whichcontains the control of validate and maximum and minimum values which hold themaximum and minimum values of the valid range.Regular Expression Validator:Regular Expression Validators are used to check if the value in a control matches apattern defined by the regular expression. Notable property for this control is theValidationExpression property, which allow us to select a predefined expression which wewant to match with the data enter in a control.DEPT OF IT, PDCE 2009-2010 Page 13 FRONT OFFICE AUTOMATION SYSTEMCustom Validator:Custom Validator is used to our own Validation for the data in a control. Forexample, you can check the value entered by a user is even or odd, with this control whichis not possible with any of the above mentions validation controls. You write the script forthe validation for JavaScript or VB script and associate that script function to theClientValidationFunction property of this control.DEPT OF IT, PDCE 2009-2010 Page 14 FRONT OFFICE AUTOMATION SYSTEM 2.ANALYSIS REQUIREMENT ANALYSIS:Feasibility study is an important phase in the software development process. It enablesthe developer to have an assessment of the product being developed. It refers to thefeasibility study of the product in terms of out comes of our product, operational use andtechnical support required for implementing it.Feasibility study should be performed on the basis of various criteria and parameters.The various feasibility studies are:? Economic feasibility,? Operational feasibility,? Technical feasibility. Economic feasibilityTime Based:If the administrator or the subjective person has to know about the where abouts ofdifferent customers and their calls info, then in the manual system a concentrated searchhas to be applied through many registers or ledgers, which is time consuming. If within thesystem some data has to be registered then all the referential registers have to be filledsequentially which is a redundant process. With the designed database all these overheadsare eliminated, making the actual system faster in calculating the call amount,advancepayment and current balance, which keep the system in pace with the associated trends andtechnologies.DEPT OF IT, PDCE 2009-2010 Page 15 "