Announcing the release of ALExSim-USAS version 1.0 (full version)

This is the announcement for the release of the new version of ALExSIM (USAS) ver 1.0 (full version)

The release can be downloaded from the Download page

The distribution file (ZIP) should contain the following items:

• AlexsimUsas-v1-0.jar
• lib folder (contains the required library files)
• Readme.txt

To install, download and extract the ZIP file in a chosen directory.
The application is a Java application and require the Java Virtual Machine (JRE 1.8 and above).
The readme.txt contains the instructions on how to run the application.

Small fix for low resolution display screen

I just found out that some users with small display or low screen resolution have difficulties to view the application. 

So i made a release with quick fix by adding scrollbars to the main application window/frame, so that if the screen is too small, scrollbars will appear and allow user to view the hidden part (part that exceeds the display screen).

The latest and updated version, version 1.2.2 is available and can be downloaded from the download page.

Announcing the release of ALExSIM-USAS version 1.2 Beta

This is the announcement for the release of the new (Beta) version of ALExSIM (USAS) ver 1.2.

The release can be downloaded here : ALExSIM (USAS) ver 1.2 (Beta)

See the Download page for details about this version.

The distribution file (ZIP) should contain the following items:

• AlexsimUsasEval-v1-2.jar
• lib folder (contains the required library files)
• Readme.txt

To install, download and extract the ZIP file in a chosen directory.
The application is a Java application and require the Java Virtual Machine (JRE 1.8 and above).
The readme.txt contains the instructions on how to run the application.

Currently the fully functional evaluation version will be offered until 1 June 2020. After this date, the evaluation copy will only offer basic or limited functions.

The first complete version is planned to be released on 1 June 2020.

Found a bug for Multilevel Queue (Preemptive)

( STATUS UPDATE - 11 Feb 2020 : This bug has been fixed. Will be included for the next release, Beta 1.2)


I just found a bug in version 1.1 for Multilevel Queue (Preemptive).

The following test data and options produced the incorrect result for the algorithm.

Process details (data file 'test.csv'):

process id, burst time, arrival at, priority no., start at, waiting time, completion at,turnaraound time
A,11,15,0,-1,-1,-1,-1
B,1,1,1,-1,-1,-1,-1
C,11,0,1,-1,-1,-1,-1
D,1,19,0,-1,-1,-1,-1
E,20,10,1,-1,-1,-1,-1


Set the options for Multilevel Queue

Range by : Priority no.

Level 1 : Round-Robin, min: 0 max: 0 quantum:10
Level 2 : SJF,  min: 1 max: 1
Level 3 : FCFS,  min: 2 max: 2


Simulation will produce the results of this bug (the turnaround time are incorrect.)
Still fixing it.

Announcing the release of ALExSIM-USAS version 1.1 Beta

This is the announcement for the release of the new (Beta) version of ALExSIM (USAS) ver 1.1.

The release can be downloaded here : ALExSIM (USAS) ver 1.1 (Beta)

See the Download page for details about this version.

The distribution file (ZIP) should contain the following items:

• AlexsimUsasEval-v1-1.jar
• lib folder (contains the required library files)
• Readme.txt

To install, download and extract the ZIP file in a chosen directory.
The application is a Java application and require the Java Virtual Machine (JRE 1.8 and above).
The readme.txt contains the instructions on how to run the application.

Currently the fully functional evaluation version will be offered until 1 April 2020. After this date, the evaluation copy will only offer basic or limited functions.

The first complete version is planned to be released in June 2020.