# Concept Justification of Future 3 DPVS and Novel Approach towards its Conceptual Development
## 4 Conclusions and Future Direction  
This paper has introduced the evolution trend of the cell culture scaffold and brought up the novel scaffold concept of 3 DPVS, which has high potential to be a scaffolding product in near-future scaffold engineering. To support this concept, firstly the limitations of traditional mechanisms regarding cell culture, scaffolding and vibration have been addressed, with 3 DPVS indicated as the product to mitigate the existing research gap. Connecting this, a further detailed justification has been conducted in another dimension, utilizing general system evolution laws and principles in stage developments. Since these laws and principles have been validated and proven by previous engineers, researchers and designers, the justified concept of 3 DPVS has high practicability and feasibility to be developed in the engineering realm by recent or future practitioners. After the thorough justification of the 3 DPVS concept, this study has also preliminarily established the conceptual design, via investigating and integrating a traditional engineering design process (EDP) and traditional conceptual design, into the context of potential 3 DPVS conceptual design. Different stages, with detailed steps inside the stages, have been illustrated, each step being studied and built up via scientific thinking and expertise in engineering design. Among the three stages of conceptual design, proposed by this study, namely design initiation, concept generation and concept evaluation, concept generation can be considered as the most vital one, due to its innovative nature and functionality. Incorporated with the conceptual development of 3 DPVS, in this study we have also proposed several methodologies for each stage. As discussed, since there has not yet been a formal design methodology or theory for scaffold design, the approach of selecting, identifying and adapting EDP process on scaffold application can be regarded as innovative and interesting. A literature review (on scaffolding, 3 DP, cell culture, and vibration), as the methodology for design initiation, could help designers gain a clear picture of what 3 DPVS will be and what the foundation is built, as well as knowing the tailored 3 DPVS requirements in different case scenarios. Following this, QFD and TRIZ might be considered as promising methods that can be applicable for 3 DPVS innovation and conceptual development. Future research, continuing the direction established \begin{table}
\begin{tabular}{l l l l} \hline \hline \multicolumn{1}{c}{\multirow{2}{*}{**Methodology/Tools**}} & \multicolumn{1}{c}{\multirow{2}{*}{\begin{tabular}{c} **Stages for Conceptual** \\ **Design of 3 DPVS** \\ \end{tabular} }} & \multicolumn{1}{c}{\multirow{2}{*}{\
\begin{tabular}{c} **Tasks** \\ \end{tabular} }} & \multicolumn{1}{c}{\multirow{2}{*}{
\begin{tabular}{c} **Notes** \\ \end{tabular} }} \\ \hline Literature Review & & & Define Base Model & \\ Quality function deployment & Stage 1: Design Initiation & Define Ideal Model & Conceptual Design \\ (OFD) method and Support & & Identify and Analyze Design Requirements, & \\ tools & & attributes and components & \\ Theory of Innovative & Stage 2: Concept & Generate 3 DPVS Design Criterion & \\ Problem-Solving (TRIZ)-based & Generation and & Contradiction-solving & Conceptual Design \\ Methodology and tools & Innovation & Concept Innovation and Generation & \\ QFD Method and & Stage 3: Concept & Weight Concepts and Solutions & \\ Weight-ranking tools & Evaluation and Solution & Rank and Compare Generated Concepts & \\ Selection & Selectment & 3 DPVS Solutions & \\ Computer-aided design & & Bridge Detailed Design Stage in 3 DPVS & \\ (CAD), Computer & & CAD Simulation for Further Analysis of & Future Detailed Design Phase \\ Simulation \& 3 DP & & 3 DP Prototyping and Testing \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Possible methodologies and tools for the conceptual stage of 3 DPVS.