<div>1 Introduction.- 1.1 Complexity of Health Care Systems.- 1.2 Changes in Health Care Systems.- 1.3 Challenges for Hospital Management.- 2 Research Problem.- 3 Aims.- 4 Methodical Approach.- 4.1 Foundation of the Methodology.- 4.2 Structure of the Thesis.- 5 Results of the Development of DERESIS Model.- 5.1 Situation of Resource Management using the Example of Sterile Goods Management in Hospitals.- 5.2 Knowledge Requirements of DERESIS Model.- 5.3 Development of the Theoretical DERESIS Model.- 5.4 Evaluation of the DERESIS Model.- 6 Discussion.- 6.1 Discussion of the Methodology for the Development of the DERESIS Model.- 6.2 Discussion of the Results.- 6.3 Strengths and Weaknesses of this Study.- 6.4 Transferability.- 7 Future Research.- Acknowledgment.- Reference.- Glossary.- Appendix.- Appendix 1: Overview of Medical Decision Making.- Appendix 2: The 6-layer Model.- Appendix 3: The Layout of CSSD.- Appendix 4: The General Flow of Sterile Goods between Operating Theatre and Central Sterile Supply Department.- Appendix 5: Five Scale Fuzzy Linguistic of Performance Values in Hospital of In-house and Outsourcing Sterile Goods.- Appendix 6: Five Scale Fuzzy Linguistic of Weight of Importance of Each Criterion.- Appendix 7: Five Scale Fuzzy Number of Performance Values in Hospital of In-house and Outsourcing Sterile Goods.- Appendix 8: Five Scale Fuzzy Number of Weight of Importance of Each Criterion.- Appendix 9: Symbol. </div><div><br></div>