Transaction Processing Systems

UNIT II

Transaction Processing Cycle

Data Entry Activities Transaction Processing Activities File and Database Processing Document and Report Generation Inquiry Processing

Transaction Processing System

Data Entry Transaction Processing Document

and

Report Generation

Inquiry ProcessingFile and Database Processing

Data Entry Activities

Data is captured and collected by recording, coding and editing activities

Traditional Data Entry – People Involved– Get data, Edit it and batch it, key it into computer

then sort and store.– Disadvantages : Too costly, Increases potential

errors, Too many activities, many people and media involved.

Data Entry Activities

Source Data Automation– From source that generates data– By using machine readable media– Optical Scanning, MICR, Light Pens, Voice Input,

Touch Screen Electronic Data Interchange (EDI)

– Complete Automation– From start till information is got. – For eg. Orders put up in internet and customers fill in

data that is fed into the Sales TPS and then processed

Transaction Processing Activities

Batch Processing– Process

Gather Source Data Record data and input Sort Update Master file

– Advantages : Efficiency, Economy, Control– Disadvantages : Frequently out-of-date Master file

Transaction Processing Activities

Real Time Processing– Processing as soon as transaction gets over

Levels of Systems– Inquiry / Response Systems (Information Retrieval)– Data Entry Systems (PoS)– File Processing Systems (Collect, Convert,

Manipulate and Store (no output))– Full Capability Systems (Eg. Indian Railways

Ticketing)– Process Control Systems (Full Capability + Control

(uses info output to control))

Transaction Processing Activities

Real Time Processing Advantages

– Immediate Updation

Disadvantages– Security– Cost

File and Database Processing

Maintenance Activities : Correct and Update Information

Inquiry Processing

Interrogation of Online files and database by end users

Eg. Getting Account Information

Document and Report Generation

Action Documents– Initiate actions / transactions

Information Documents– Relate, Confirm or Prove that transactions

occurred

Turnaround Documents– Returned back to the sender

Attributes of Information Quality

Time Dimension– Timeliness (provided when needed)– Currency (up-to-date when provided)– Frequency (as often as needed)– Time Period (info about past, present and future

time periods)

Attributes of Information Quality

Content Dimension– Accuracy (free from errors)– Relevance (related to needs)– Completeness (all info is provided)– Conciseness (info needed alone is provided)

Attributes of Information Quality

Form Dimension– Clarity (easy to understand form)– Detail (in detail or summary form)– Order (in predetermined sequence)– Presentation (numeric, graphic, narrative)– Media (as required [printed paper, video displays,

disks, etc.])

Information Reporting System

Produce information products (reports and documents) that support day-to-day decision making

Information Reporting Alternatives :– Periodic Scheduled Reports– Exception Reports (specific conditions)– Demand Reports and Responses

Executive Information Systems

Information Reporting Systems + Decision Support Systems

For Strategic Planning and Control Much of top management information comes

from non-computer sources Now computer-based EIS developed – easy

to operate and understand

Executive Information Systems

Tailored to the preferences of the executives Use of Graphics Get detailed information in areas of interest

to them