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Achieving quality contraints

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K Senthil Kumar
K Senthil Kumar

The document discusses achieving quality constraints in mobile applications. It addresses key factors like performance, usability, security, availability, and modifiability. It provides tips to optimize performance such as understanding the target device, tools, and programming language used. Usability can be improved with task-based design, search functions, optimized speeds and images. Security risks from trusting platform security or using unverified code are highlighted. Availability relies on effective offline and synchronization functionality. Modifiability is supported by modular code design.

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Achieving Quality Constraints in mobile application K.Senthil Kumar Sri Eshwar College of Engineering, Coimbatore
Achieving Quality Constraints  What is Quality in mobile application?  Quality of mobile application depend upon performance, usability, security, availability and modifiability.  If your application satisfies all the parameters then it is said as quality mobile application that every one loves to use.  If one implement all this parameters then app become daily habit of users.
Performance in app  Performance of app plays important role in getting 5 star rating in all marketplaces like playstore, app store or windows store.  If application takes more then 10 seconds to load then it will not be used by users.  If application takes too long time to process data then it will not be used by users.  If application takes too long time to switch between screens then it will not be used by users.  The performance of app is important factor which decides the success of app.
How to achieve performance?  Understand your target device.  Most developers forget about device, they classify device based on operating system, but forget about configuration of devices.  Always classify devices based on specification sheet.  Try developing apps based on low specification mobile which will automatically run in all mobiles.
How to achieve performance?  Understand your tools  Try to understand the tools that is used to develop the mobile app.  Better understanding of tools helps to make important architectural design.  Ex – Understanding about phone gap helps to develop app for multiple platforms.
How to achieve performance?  Understand core concepts of the language used to build app  Understanding core programming language used to develop app will help to avoid performance issues.  Ex – A extra string comparison in jscript will surely reduce the performance.  Understand the library.  Try to understand the library used in tools. If you simply call a third party methods for simple operation then it will increase battery usage and reduce the performance.  Always use standard codes for simple task.
How to improve usability?  Usability enables the users to easily navigate between different parts of the app.  The proper links to various parts of app helps to improve the usability of app.  Ex – If the user reaches end of single screen then placing top button or next button helps to navigate to top of page or next screen.  The best usability practice helps to acquire more customers to app.
How to improve usability?  The 10 must to do things for improving usability are  Use a task based design  Add a sticky menu with search option  No dividers needed  Use short forms  Tone it down  Button hit areas  Don’t use too many font sizes  Optimize for speed  Switch to desktop site and back  Test your Mobile UX again and again
 Use a task based design  Always design app based on user needs. The app users opens your app to do some task on the go.  The home screen should provide option to do task that user want to do in your app.  Add a sticky menu with a search option  Users always want menu with search option in all places.  Place a sticky menu that will automatically fits during page navigation.  No Dividers needed  Don’t use dividers which adds line in UX which creates negative experience.  Place elements in good order instead of divider.
 Use short forms  The size of any data entry form should be limited to 3 to 4 elements. If its long like desktop site then user navigate to other app.  Ex : If a user wrongly enters password then instead of loading a new form to create a user just change the button to register and create user with minimal data.  Tone it down  The minimal use of colors will create positive UX.  The multicolor UX confuses the user.  Button hit areas  Most users click buttons using thumbs, so place the button that is easily accessible using thumb.
 Don’t use too many font sizes  Due to limitation in screen size using two different font size creates positive user experience.  If you use more number of font size then it mess up the screen which gives negative user exp.  Optimize for speed  The image plays important role in speed of app.  The optimized images increase the app speed.  Switch to desktop site and back  Allowing user to switch between desktop site and mobile app is very important.  Some users always want to do some tasks in desktop site
 Test your Mobile UX again and again  Testing Mobile UX is important factor which helps to identify all negative factors of mobile app.  If one consider all these standards while designing app then user will get positive user experience.
How to protect app from hackers  Protecting app is important because customers providing confidential data to us based on trust.  If we don’t provide security then confidential data will be hacked by hackers.  If user knows app is not secured then he or she may not use app.  You have to ensure security by avoiding common mistakes.  So what are all the common mistakes?
How to protect app from hackers  Trusting build in platform security  The common mistake done by developers are trusting build in platform security but lot of security holes are there in platform.  App developers should use third party security mechanism to protect the app.  Using code from other developer  It take time to build complete app from scratch, so some developers use code from internet.  Hackers create certain codes and publish in internet to get access into your mobile app users.
How to protect app from hackers  Not planning for data caching vulnerabilities  The hackers tries to read the cache information through other app.  The apps like free games are created to hack the users mobile.  The data cache should be secured using password or some other way to protect the data.  Foregoing through security testing  Before launching app to market perform all security testing.  You can hire a ethical hackers for security testing.
How to protect app from hackers  Not using Encryption or week Encryption  Never create financial transaction based apps without implementing strong encryption.  If you want to make your app as daily habit of user then implement encryption.  Forgetting to Plan for Physical Security Breaches  Always give importance to physical security because if users misses his mobile then probability of misusing data is high.  So periodic session time out is important in mobile app.
How to protect app from hackers  Not Implementing Secure Communications to Servers.  You should establish connection to server only through secured protocols like https.  If you fail to do then it is easy to hack the server using path tracing or reading mobile traffic through proxy.  Patching Your App Too Slowly  Frequent security update of app increase the hacking time.  The frequent update of app enables security by closing all open holes in security.
How to maintain app availability?  Availability refers to continuous working of application in both offline and in online mode.  Today mobile users are travelling across multiple cell sites which frequently disturb the wireless internet connectivity to mobile.  This interruption should not affect the mobile app.  It is possible to achieve high availability by effectively managing offline data.  You can also provide high availability by giving effective synchronization mechanism
How to maintain modifiability?  Modifiability helps to release multiple version of app more easily  It is achieved by developing as multiple units instead of single unit.  If any bugs arises after launch then it is easy to modify the unit instead of changing everything in code.

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Achieving quality contraints

  • 1. Achieving Quality Constraints in mobile application K.Senthil Kumar Sri Eshwar College of Engineering, Coimbatore
  • 2. Achieving Quality Constraints  What is Quality in mobile application?  Quality of mobile application depend upon performance, usability, security, availability and modifiability.  If your application satisfies all the parameters then it is said as quality mobile application that every one loves to use.  If one implement all this parameters then app become daily habit of users.
  • 3. Performance in app  Performance of app plays important role in getting 5 star rating in all marketplaces like playstore, app store or windows store.  If application takes more then 10 seconds to load then it will not be used by users.  If application takes too long time to process data then it will not be used by users.  If application takes too long time to switch between screens then it will not be used by users.  The performance of app is important factor which decides the success of app.
  • 4. How to achieve performance?  Understand your target device.  Most developers forget about device, they classify device based on operating system, but forget about configuration of devices.  Always classify devices based on specification sheet.  Try developing apps based on low specification mobile which will automatically run in all mobiles.
  • 5. How to achieve performance?  Understand your tools  Try to understand the tools that is used to develop the mobile app.  Better understanding of tools helps to make important architectural design.  Ex – Understanding about phone gap helps to develop app for multiple platforms.
  • 6. How to achieve performance?  Understand core concepts of the language used to build app  Understanding core programming language used to develop app will help to avoid performance issues.  Ex – A extra string comparison in jscript will surely reduce the performance.  Understand the library.  Try to understand the library used in tools. If you simply call a third party methods for simple operation then it will increase battery usage and reduce the performance.  Always use standard codes for simple task.
  • 7. How to improve usability?  Usability enables the users to easily navigate between different parts of the app.  The proper links to various parts of app helps to improve the usability of app.  Ex – If the user reaches end of single screen then placing top button or next button helps to navigate to top of page or next screen.  The best usability practice helps to acquire more customers to app.
  • 8. How to improve usability?  The 10 must to do things for improving usability are  Use a task based design  Add a sticky menu with search option  No dividers needed  Use short forms  Tone it down  Button hit areas  Don’t use too many font sizes  Optimize for speed  Switch to desktop site and back  Test your Mobile UX again and again
  • 9.  Use a task based design  Always design app based on user needs. The app users opens your app to do some task on the go.  The home screen should provide option to do task that user want to do in your app.  Add a sticky menu with a search option  Users always want menu with search option in all places.  Place a sticky menu that will automatically fits during page navigation.  No Dividers needed  Don’t use dividers which adds line in UX which creates negative experience.  Place elements in good order instead of divider.
  • 10.  Use short forms  The size of any data entry form should be limited to 3 to 4 elements. If its long like desktop site then user navigate to other app.  Ex : If a user wrongly enters password then instead of loading a new form to create a user just change the button to register and create user with minimal data.  Tone it down  The minimal use of colors will create positive UX.  The multicolor UX confuses the user.  Button hit areas  Most users click buttons using thumbs, so place the button that is easily accessible using thumb.
  • 11.  Don’t use too many font sizes  Due to limitation in screen size using two different font size creates positive user experience.  If you use more number of font size then it mess up the screen which gives negative user exp.  Optimize for speed  The image plays important role in speed of app.  The optimized images increase the app speed.  Switch to desktop site and back  Allowing user to switch between desktop site and mobile app is very important.  Some users always want to do some tasks in desktop site
  • 12.  Test your Mobile UX again and again  Testing Mobile UX is important factor which helps to identify all negative factors of mobile app.  If one consider all these standards while designing app then user will get positive user experience.
  • 13. How to protect app from hackers  Protecting app is important because customers providing confidential data to us based on trust.  If we don’t provide security then confidential data will be hacked by hackers.  If user knows app is not secured then he or she may not use app.  You have to ensure security by avoiding common mistakes.  So what are all the common mistakes?
  • 14. How to protect app from hackers  Trusting build in platform security  The common mistake done by developers are trusting build in platform security but lot of security holes are there in platform.  App developers should use third party security mechanism to protect the app.  Using code from other developer  It take time to build complete app from scratch, so some developers use code from internet.  Hackers create certain codes and publish in internet to get access into your mobile app users.
  • 15. How to protect app from hackers  Not planning for data caching vulnerabilities  The hackers tries to read the cache information through other app.  The apps like free games are created to hack the users mobile.  The data cache should be secured using password or some other way to protect the data.  Foregoing through security testing  Before launching app to market perform all security testing.  You can hire a ethical hackers for security testing.
  • 16. How to protect app from hackers  Not using Encryption or week Encryption  Never create financial transaction based apps without implementing strong encryption.  If you want to make your app as daily habit of user then implement encryption.  Forgetting to Plan for Physical Security Breaches  Always give importance to physical security because if users misses his mobile then probability of misusing data is high.  So periodic session time out is important in mobile app.
  • 17. How to protect app from hackers  Not Implementing Secure Communications to Servers.  You should establish connection to server only through secured protocols like https.  If you fail to do then it is easy to hack the server using path tracing or reading mobile traffic through proxy.  Patching Your App Too Slowly  Frequent security update of app increase the hacking time.  The frequent update of app enables security by closing all open holes in security.
  • 18. How to maintain app availability?  Availability refers to continuous working of application in both offline and in online mode.  Today mobile users are travelling across multiple cell sites which frequently disturb the wireless internet connectivity to mobile.  This interruption should not affect the mobile app.  It is possible to achieve high availability by effectively managing offline data.  You can also provide high availability by giving effective synchronization mechanism
  • 19. How to maintain modifiability?  Modifiability helps to release multiple version of app more easily  It is achieved by developing as multiple units instead of single unit.  If any bugs arises after launch then it is easy to modify the unit instead of changing everything in code.