On the Requirements of New Software Development

TL;DR

This paper emphasizes the importance of adaptable software development practices that account for changing operational conditions, proposing requirements and a practical example of dynamic redundancy for enhanced system robustness.

Contribution

It introduces the concept of 'New Software Development' focusing on adaptability and presents a practical example of dynamic redundancy in data integrity systems.

Findings

Dynamic redundancy adapts to run-time disturbances.

Adaptive approaches improve system robustness.

The proposed tool demonstrates practical viability.

Abstract

Changes, they use to say, are the only constant in life. Everything changes rapidly around us, and more and more key to survival is the ability to rapidly adapt to changes. This consideration applies to many aspects of our lives. Strangely enough, this nearly self-evident truth is not always considered by software engineers with the seriousness that it calls for: The assumptions we draw for our systems often do not take into due account that e.g., the run-time environments, the operational conditions, or the available resources will vary. Software is especially vulnerable to this threat, and with today's software-dominated systems controlling crucial services in nuclear plants, airborne equipments, health care systems and so forth, it becomes clear how this situation may potentially lead to catastrophes. This paper discusses this problem and defines some of the requirements towards its effective solution, which we call "New Software Development" as a software equivalent of the well-known concept of New Product Development. The paper also introduces and discusses a practical example of a software tool designed taking those requirements into account --- an adaptive data integrity provision in which the degree of redundancy is not fixed once and for all at design time, but rather it changes dynamically with respect to the disturbances experienced during the run time.