A viable investment system and strategic model relies on a solid understanding of financial goals, risk preferences and current market conditions. Here are the key elements to consider when developing a viable investment system and strategic model: 

1. Financial Goals: Clearly define your short, medium and long term financial goals, such as retirement, saving for education, buying a house etc. These goals will determine your investment horizon and risk tolerance. 

2. Asset Allocation: Develop an asset allocation strategy that allocates your portfolio among different asset classes such as stocks, bonds, real estate, commodities and cash based on your goals and risk tolerance. 

3. Diversification: Adequate diversification reduces risk by spreading investments across different asset types, sectors and geographic regions. This can help mitigate the effects of market volatility. 

4. Monitoring and Rebalancing: Establish a process for regularly monitoring your portfolio to ensure it is still aligned with your goals and rebalance it as necessary to maintain your target asset allocation. 

5. Financial Education: Invest time in your financial education to understand the fundamentals of investing, risk management and different investment vehicles. 

6. Tax Planning: Consider the tax implications of your investments and develop strategies to minimize your tax exposure legally and ethically. 

A viable strategic model also depends on your ability to remain disciplined, avoid impulsive reactions to market fluctuations, and stick to your long-term investment strategy. Working with an experienced financial advisor can also be beneficial in designing and implementing a sound investment system tailored to your specific needs.