Interviewing stakeholders is a common way to elicit information about requirements of the system-to-be and the conditions in its operating environment. One difficulty in preparing and doing interviews is how to avoid missing the information that may be important to understand the requirements and environment conditions. Some information may remain implicit throughout the interview, if the inter...

This paper investigates the potential use of problem descriptions to represent and analyse variability in context-aware software products. By context-aware, we refer to recognition of changes in properties of external domains, which are recognised as affecting the behaviour of products. There are many reasons for changes in the operating environment, from fluctuating resources upon which the pr...

With the introduction of the On Demand Operating Environment (ODOE), traditional capacity planning methodologies are being replaced by just in time resource allocation. This paper examines the application of supply chain mechanisms to dynamically coordinate the available compute capacity/resources with the service capacity/resources requirements. After reaching the ideal condition with a comple...

Medusa is an applications environment for distributed multimedia which has been designed and developed at the Olivetti Research Laboratory in Cambridge, U.K. The software building blocks, or modules, are written in C++, while the applications that create networks of modules and make useful things with them are written in Tcl/Tk/Tcl-DP.

‘Paired’ closely-spaced parallel approaches may enable closely-spaced runways to operate at nearvisual capacity in all weather conditions. This concept requires each trail aircraft in the pair to fly in a ‘safe zone’ in front of the lead aircraft’s wake vortex and in back of the lead aircraft’s potential blunder trajectories. This paper examines the position and length of this safe zone to unde...

Mechatronic units are characterized by a complex interaction of functions from mechanics, electronics, communication and computer systems. These different fields of technology as well as influences from the operating environment must be reflected in the dependability consideration, for which so far no comprehensive framework exists. In this contribution, a framework for consideration of dependa...

Modern software systems are composed of different modules and objects that interact with each other. Each of these components may satisfy a local security policy. It may also satisfy a global security policy with respect to its intended operating environment. However, when many components are put together, because of unexpected interactions among them, a local security policy and/or the global ...

We present a Secure E-commerce Protection Profile (SEPP) that captures security requirements for securing sessions in the e-commerce operational environment. The SEPP is prepared in accordance with the Common Criteria (CC), Version 2.1, as specified by the ISO 15408 standard. The SEPP states the requirements that sessions must satisfy in order to respond to the needs of e-commerce. The Target o...

The Department of Defense (DoD) strives to improve Live, Virtual, and Constructive Integrated Architectures (LVCIA) with the objective to assemble models and simulations (M&S) that create representations of a credible operating environment. Changes in the operating environment and the needs of the warfighter require a continued focus on developing corporate and cross-cutting business practices ...