# Scrum for cyber-physical systems: a process proposal

## TL;DR

This paper proposes an extension of Scrum, called Scrum CPS, tailored for cyber-physical systems development, enabling iterative development of software, hardware, and mechanics through simulation and parallel modeling.

## Contribution

It introduces Scrum CPS, a process that adapts Scrum for cyber-physical systems by integrating hardware and mechanical design artefacts into an agile framework.

## Key findings

- Enables iterative development of all design artefacts.
- Supports simulation of unavailable hardware and mechanics.
- Facilitates parallel production and detailed modeling.

## Abstract

Agile development processes and especially Scrum are changing the state of the practice in software development. Many companies in the classical IT sector have adopted them to successfully tackle various challenges from the rapidly changing environments and increasingly complex software systems. Companies developing software for embedded or cyber-physical systems, however, are still hesitant to adopt such processes. Despite successful applications of Scrum and other agile methods for cyber-physical systems, there is still no complete process that maps their specific challenges to practices in Scrum. We propose to fill this gap by treating all design artefacts in such a development in the same way: In software development, the final design is already the product, in hardware and mechanics it is the starting point of production. We sketch the Scrum extension Scrum CPS by showing how Scrum could be used to develop all design artefacts for a cyber physical system. Hardware and mechanical parts that might not be available yet are simulated. With this approach, we can directly and iteratively build the final software and produce detailed models for the hardware and mechanics production in parallel. We plan to further detail Scrum CPS and apply it first in a series of student projects to gather more experience before testing it in an industrial case study.