Monthly Archives: October 2010

The Baker’s Dozen of Use Cases

Glennan Carnie

Glennan Carnie

Technical Consultant at Feabhas Ltd
Glennan is an embedded systems and software engineer with over 20 years experience, mostly in high-integrity systems for the defence and aerospace industry.

He specialises in C++, UML, software modelling, Systems Engineering and process development.
Glennan Carnie

Latest posts by Glennan Carnie (see all)

RULE 4 : The “Famous Five” of requirements modelling

As I discussed in Rule 1, a common misunderstanding of use cases is that they are the software requirements. Unfortunately, this isn’t the situation. Use cases are merely an analysis tool – albeit a very powerful tool (when used in the right situation).

Use cases are just one technique for understanding and analysing the requirements. In order to fully understand the requirements our use cases are going to need some […]

Posted in Design Issues, General, UML | Tagged , , , , , , , , , | Leave a comment

EMBEDDED PROGRAMMERS’ GUIDE TO THE ARM CORTEX-M ARCHITECTURE

Niall Cooling

Director at Feabhas Limited
Co-Founder and Director of Feabhas since 1995.
Niall has been designing and programming embedded systems for over 30 years. He has worked in different sectors, including aerospace, telecomms, government and banking.
His current interest lie in IoT Security and Agile for Embedded Systems.

At Embedded Live 2010 I shall be presenting a half-day tutorial entitled “EMBEDDED PROGRAMMERS’ GUIDE TO THE ARM CORTEX-M ARCHITECTURE”.

Feabhas have been training embedded software engineers in languages and architectures for the last 15 years. For the last decade we have been using ARM based target systems for all our programming based courses (C, C++ and testing – ARM7TDMI) and embedded Linux courses (ARM926). However with the development and release of the new generation Cortex micros we are moving our […]

Posted in C/C++ Programming, General, RTOS, training | 1 Comment

The Baker’s Dozen of Use Cases

Glennan Carnie

Glennan Carnie

Technical Consultant at Feabhas Ltd
Glennan is an embedded systems and software engineer with over 20 years experience, mostly in high-integrity systems for the defence and aerospace industry.

He specialises in C++, UML, software modelling, Systems Engineering and process development.
Glennan Carnie

Latest posts by Glennan Carnie (see all)

RULE 3: Never mix your Actors

The UML definition of an Actor is an external entity that interacts with the system under development. In other words: it’s a stakeholder.

Having analysed all your stakeholders (see Part 3 ) it’s tempting to stick them (no pun intended) as actors on a use case diagram and start defining use cases for each.

Each set of stakeholders (Users, Beneficiaries or Constrainers) has its own set of concerns, language and concepts:

Concerns.
Each stakeholder group has a different […]

Posted in Design Issues, UML | Tagged , , , , | Leave a comment