%&tex
\chapter{Case Study: Execution}
\label{chap:case_experiment}
This chapter presents the execution of the case study.
Where the goal of the case study is to evaluate the design plan as presented in \autoref{chap:analysis}.
To achieve this goal, I develop a system according to the design plan and document this design process.
As described in \autoref{sec:sod}, the subject of design is a "Tweet on a Whiteboard Writer".
Documenting the process is done by following the evaluation protocol as described in \autoref{sec:evaluation_protocol}.
To start the case study unbiased, during the preparation I did perform as little preliminary research as possible on the design options of the whiteboard writer.

The chapter begins with the section about the preparation phase, which contains the five steps from problem description to test protocol step as shown in \autoref{fig:design_plan_analysis}.
This is followed by two completed development cycles in the later two sections.
Both of these sections cover the feature selection, variable-detail approach and rapid development steps as shown in \autoref{fig:design_plan_analysis}.
Each design step is described in a separate section.
Herein, the result of each design step is presented and concluded with an evaluation section at the end.
This evaluation section discusses the pairs of questions that were answered according to the evaluation protocol (\autoref{tab:prepost}).
The questions regarding the design method itself are discussed in \autoref{chap:reflection}.

\section{Preparation Phase}
The preparation phase contains four design steps.
It begins with a problem description.
The problem description is used to create a list of system requirements.
Based on the requirements, a number of design solutions proposed and eventually one of these solutions is chosen as initial design.
Splitting the initial design into features is done in the feature definition step.

\input{content/case_experiment_problem_description.tex}
\input{content/case_experiment_specifications.tex}
\input{content/case_experiment_initial_design.tex}
\input{content/case_experiment_feature_definition.tex}
\input{content/case_experiment_test_protocol.tex}

\section{First Development Cycle}
\input{content/case_experiment_end-effector.tex}

\section{Second Development Cycle}
\input{content/case_experiment_scara.tex}

\section{System Design Validation}
\input{content/case_experiment_prototype.tex}
