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Saturday, November 23, 2019

Point of Sales System


Point of Sale System
Point of sale (POS) system is the spot where your customer makes the payment for goods or services that are offered by your company.
Point of sale systems are systems that enable the business transaction between the client and the company to be completed. POS system is a computerized network that consists of the main computer linked with several checkout terminals and supported by different hardware features starting from barcode scanners and ending with card payment terminals.(POS System, What is It? | Point of Sale Systems | Erply, 2015)




What input and output devices are found at POS terminals?
Input devices
  • Barcode reader - to scan item bar codes
  • Keyboard - to type barcode number in case barcode doesn’t scan correctly
  • Chip and PIN reader - used by customers to enter PIN number for electronic fund transfer (EFT) payments
  • Magnetic Stripe Reader - used scan customer loyal cards (Tesco club card, Shukran card etc.)
Output devices
  • Monitor - to view scanned items
  • Speaker - to output sound that item has been scanned properly
  • Printer - to print the customer receipt(haslab IG ICT, no date)

Advantages of POS System

  1.    Increase business efficiency – time saving in managing bills and orders, and sales report generated in convenient way. It also increases the efficiency of daily sales environment by using different features such as barcode scanners or e-wallet payment terminals.
  2.         Inventory control – integrated system, can automatically generate a purchase order and reorder items (when the quantity less than certain unit). It reduced the amount of work, reduce time of work, at the same time can increase profit margins.
  3.         Ease of use – user friendly system, with simple GUI makes it easy for employees to learn, shortening training time, help employees to be more productive.
  4.         Greater accuracy
  5.         Reporting features
  6.         Detailed Receipts
  7.       Faster service(‘Point of Sale Advantages: Top 10 Reasons POS Systems are Better Than Cash Registers -’, 2010)



REFERENCES
  1. haslab IG ICT (no date). Available at: http://haslab.co.uk/IG%20ICT/unit6_IT_apps_13.html (Accessed: 24 November 2019).
  2. ‘Point of Sale Advantages: Top 10 Reasons POS Systems are Better Than Cash Registers -’ (2010), 28 August. Available at: https://pointofsale.com/top-ten-reasons-point-of-sale-systems-are-better-than-cash-registers/ (Accessed: 24 November 2019).
  3. POS System, What is It? | Point of Sale Systems | Erply (2015) Erply Retail Software. Available at: https://erply.com/pos-system/ (Accessed: 24 November 2019).






Saturday, October 5, 2019

Issues in Software Testing

testbytes.net identified 5 major issues which are inherent  to software testing.
i)   Inadequate schedule of training testing should be done periodically, and it must always go hand in hand with system development. Managers should not overlook software testing until the end of system development.
ii)  Insuffnicient testing environment and tools - team manager must make sure hardware and software requirements are met for testing, work close with the end user - testing is carried out fast
iii) Wrong testing mindset – should find the system defects instead of system functionalities
iv) Testing lesson are often ignored – management must make sure every lesson learnt should be documented
v)  Poor integration of testing and engineering process – not properly integrated, should test all parameters, and look into the project specific needs.

Security Risk Analysis & Validation Plan


What is Risk Analysis?
Risk analysis is a technique used to identify and assess factors that may jeopardize the success of a project or achieving a goal.(Wikipedia)

What is software risk analysis? A software risk assessment applies classic risk definitions to software design and produces mitigation requirements (Gary Mc Graw)

Risk Analysis method?

ALE = SLE × ARO

SLE = Single Loss Expectancy (AV * EF)
ARO = Annualized Rate of Occurrence
ALE = Annual Loss Expectancy



What is Validation Plan?
Validation Plans define the scope and goals of a validation project. The Validation Plan is written
at the start of the validation project (sometimes concurrently with the user requirement
specication) and is usually specic to a single validation project. (OfniSystem)

What is Safety Validation?
A plan is required for routine actions such as:
- proof testing
- maintenance override conditions
- documentation of system demand
- failure rates
This is to verify if they are consistent with the safety integrity level (SIL) verication
calculations, audit and test documentation, and diagnostic and repair procedures. (EMERSON)
International Standards such as ISO 13849, IEC 62061 and IEC 61508 demand validation of safety
systems independent of the design function. Validation is essential to prove that your machinery
is safe. (PILZ)

Saturday, September 21, 2019

Pedestrian counting system consists of outdoor pedestrian counters for people traffic counting, the data collector for data reading, and reporting software with various ready to use pedestrian traffic reports.
Wireless footfall traffic counters powered by standard AA batteries and work for up to 2 years for one-direction movement detection and 6-12 month if two-direction pedestrian sensors are counting sensors used. 
Pedestrian traffic statistics stored into the internal memory of outdoor people counter that is enough for storing data backup for up to 150-250 days, depending on the sensor model.
Manual data collector supports data reading from up to 99 pedestrian counters and has built-in memory f
Sor 2000 days of hourly data shared among sensors. This device has an integrated Li-Ion accumulator that is enough for 30 days of work without a charge.
(Sensmax.Eu)

Monday, September 9, 2019

System Life Cycle

System Life Cycle

Identify -

Analyse - look at alternative solutions which could be used to solve the problems.

Design - system design; screen layout/interface, data, chose foreground and background colour, input and output of the system, etc.

Development - system development, write and test code of the system, planning test, etc

Testing - system can work properly, free error.

Implementation - implementing the system, installation, user training, etc.

Evaluation - system requirement specification, review whether system has been completed successfully.

Maintenance - maintaining the system, alteration in future.




Quiz / Games

ON TARGET

MAZE