SAD2 - chapter3

7/30/2019 SAD2 - chapter3

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CHAPTER III

SYSTEM DESIGN OF THE PROPOSED ONLINE SYSTEM

NARRATIVE DESCRIPTION OF THE PROPOSED ONLINE SYSTEM

For the proposed online system, the developers have gathered data on how to

make the transaction simple, easy and convenient for the users.

If the user does not want to be a member, he/she can still navigate the site freely.

The user can view the service request form but the system prompts the user to create

an account if he/she attempts to submit the service request form. If the user wants to

request for a service repair, he/she must access the service request form.

First, the customer registers an account and fills up necessary information about

him/her such as first name, last name, complete address, e-mail address, contact

number, username, and password. After creating an account, the customer may now go

to the services page and select the category of the appliance they want to be repaired.

After selecting a category, the customer is now ready to request for a service repair.

Second, in the service request form the user may or may not input the model

number, serial number, and warranty number of the appliance. But they must indicate

the quantity of how many appliance/s are needed to be repaired and give a short

description of the possible problem why their appliance/s is not working.


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Third, the customer chooses what date and time they prefer to be visited by the

technicians by choosing the desired date and time. There are a limited number of

service requests that can be processed and if the users preferred schedule is already

full, they must select another available schedule. The choices for the time would be

8am-11am, 11am-2pm and 2pm-5pm. All the holidays and Sundays date are not

allowed for scheduling requests.

Fourth, the customer may choose their mode of payment whether through

PayPal, using credit card, or over the counter. For credit card and PayPal transactions,

the customer must put the needed information to allow payment transaction. The

system generates an unofficial receipt as proof of an online service request. The

payment and unofficial receipt is given to the technician and the technician in return

gives to the customer the official receipt as proof of payment for the service rendered.

Lastly, the customer submits the service request form. The summary of the

transaction is seen on the customers account provided that he/she may cancel his/her

service request. After submitting the form, the customer waits 24 hours for the

confirmation of the service request.


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NEW BUSINESS PROCEDURE AND POLICIES (TERMS AND CONDITIONS)

The proposed system will come up with a new and improve business processes

with which will be implemented on the Online Service Request System for AC Appliance

Service Provider. The following policies are as follows:

Terms and Conditions:

1. Customers need to register an account to access the service request form.

2. Cancellation of service repair request should be made before 24hours of

scheduled appointment.

3. No cancellation fee for scheduling an appointment but there will be no refund for

the payment.

4. No appointments to be scheduled on current dates, Holidays, and Sundays.

5. The administrator have the right to cancel any scheduled service repair request

due to unpredictable weather conditions on the specific area (e.g. flooded area,

landslide, etc) for safety reasons of the company's workers.

6. Repairing of the physical appearance of the appliance is not covered in the

technician's job (.e.g. dent on the casing)

7. On the day of your appointment, the technicians will only just check for the defect

in the appliance to see if the damage/s are minor or major damages. The

technician/s will repair the appliance on the day of the check-up provided that


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they have the necessary tools needed in the repair but if some parts are needed

to be replaced, the technician will continue his repair on other date.

8. The service center will not accept check-up or repair of appliances of other

brands because it is exclusive only to Whirlpool products.

9. AC Appliance Service Provider can only cater customers within Metro Manila

only.


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TOOLS IN DESIGNING THE PROPOSED NEW SYSTEM

A. ENTITY-RELATIONSHIP DIAGRAM

Figure 3.0

Entity-Relationship Diagram


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B. DATABASE STRUCTURE

NORMALIZATION PROCESS

UNNORMALIZED FORMS

customerid username password description_no

appliance_no customer_no appliance_type model_type

description firstname lastname gender

address contact email date

warranty serial_no quantity amount

date_saved schedule_no schedule_date time

summary_no total_amount service_status

Table 1.0

Unnormalized Forms

Table 1.0 shows the unnormalized forms of the online service request system. It

will be broken up into several tables so that each attributes are easily sorted according

to their respective tables in the systems database.


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FIRST NORMAL FORM

firstname customerid appliance_no schedule_no

lastname customer_no appliance_type schedule_date

gender username model_type summary_no

address password description time

contact amount description_no date

email total_amount warranty date_saved

serial_no service_status

quantity

Table 1.1

First Normal Form

Table 1.1 shows the first normal form of the online service request system.


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SECOND NORMAL FORM

Customer Account Table / Registration Table

customerid firstname contact

customer_no lastname email

username gender

password address

Schedule Table / Summary Schedule Table

schedule_no date_saved service_status

schedule_date appliance_no summary_no

time customer_no

date total_amount

Damage Description Table

description_no appliance_no appliance_type

description customer_no model_type


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DATA DICTIONARY

Field Name Description Data Type Field Size

customerid Customers ID int 20

lastname Customers last name varchar 50

firstname Customers first name varchar 50

email Customers emailaddress

varchar 30

address Customers address varchar 50

contact Customers contactnumber

int 10

description Status of the damageof the appliance

varchar 50

appliance_type Type of appliance varchar 50

appliance_no Appliances name varchar 50

model_no Model type of theappliance

varchar 20

model_type Warranty no. of theappliance

int 50

warranty Warranty no. of theappliance

int 20

description_no int 20

customer_no int 20

schedule_no int 20

scheduled_date Scheduled date ofrepair

varchar 20

time Scheduled time ofrepair

int 20

date_saved

quantity Number of applianceto be repaired int 20

amount Amount of the servicecheckup/repair

int 20

admin_username Administratorsusername

varchar 50

admin_password Administratorspassword

varchar 20


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admin_fname Administrators firstname

Varchar 50

admin_lname Administrators lastname

Varchar 50

admin_email Administrators emailaddress

varchar 30

admin_idAdministrators ID

int 20

credit_noCredit card number

int 20

credit_brandCredit card name

varchar 50

total_cost Total cost of servicerepair expenses

int 30

username Customers username varchar 50

password Customers password varchar 20

Table 1.4

Data Dictionary


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CUSTOMERINFO

PAYMENTDETAILS

VERIFIEDREQUEST

SCHEDULE

UPDATESSTATUS

UPDATES CUSTOMERINFO

D1

D2

D3

DIAGRAM 0 AND EXPLODED DIAGRAMS

Figure 3.2

CUSTOMERSINFORMATION

SCHEDULEDLIST

ADMINISTRATOCUSTOMER

REQUESTFOR

SERVICEREPAIR

1.0

FILL UPNEEDED

INFO

2.0

LOGIN TOYOUR

ACCOUNT

3.0

AVAILSERVICE

REQUESTFORM

4.0

SCHEDULE

AN

APPOINT-MENT

5.0

SUBMITSERVICEREQUEST

FORM

6.0

LOGINADMIN

ACCOUNT

7.0

UPDATESCUSTOMER

INFOTRANSAC-

TION

9.0

VERIFIESCHEDULREPAIR

8.0

MAKEPAYMENT

10.0

GENERATEUNOFFICIAL

RECEIPT

11.0PAYMENTDETAILS


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Figure 3.2 shows the level 1 of the data flow diagram which illustrates how a

customer and the system interact together. It is also shown how and where the data

flows from one process to another.

D. INPUT-PROCESS-OUTPUT (IPO) CHART

Input Process Output

CustomersInformation

Add

UpdateDelete

List of CustomerReport

Warranty Transaction

AddUpdateDelete

Double check warranty

List of WarrantyTransaction Backup

Report

Schedule TransactionAdd

UpdateDelete

List

Transaction Backup

Service RepairTransaction

UpdateDeleteRepair

Compute Total Payment

Transaction BackupOfficial Receipt

Table 1.5

Table 1.5 shows the input process output chart which gives an idea about the

basic procedures of the online service request system for AC Appliance Service

Provider.


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Documents

SAD2 - chapter3