feat: add functional requirements for profitability, Monte Carlo simulation, and Capex/Opex management; enhance user guide with planners

requirements/FR-013.md

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+# Functional Requirement FR-013: Capital Expenditure (Capex) management and calculation tools for mining projects
+
+## Description
+
+The system shall provide tools to calculate and manage Capital Expenditures (Capex) associated with mining projects. This includes the ability to input, store, and analyze various capital cost components such as equipment purchases, infrastructure development, land acquisition, and other one-time expenses.
+
+## Rationale
+
+Accurate Capex calculations are essential for budgeting, financial planning, and profitability analysis in mining projects. By providing robust tools to manage these costs, the system will enable users to make informed decisions regarding project feasibility and capital allocation.
+
+## Acceptance Criteria
+
+1. **Capex Component Definition**: The system shall allow users to define and categorize various Capex components, including but not limited to:
+
+   - Equipment purchases
+   - Infrastructure development
+   - Land acquisition
+   - Other one-time expenses
+
+2. **Input and Storage**: The system shall provide interfaces for users to input Capex data and store it in a structured format for easy retrieval and analysis.
+
+3. **Capex Calculation**: The system shall include tools to calculate total Capex based on the defined components and their respective values. This includes the ability to apply formulas and algorithms to derive insights from the data.
+
+4. **Reporting and Visualization**: The system shall offer reporting and visualization features to help users understand Capex trends, identify cost drivers, and make data-driven decisions.
+
+5. **Integration**: The system shall support integration with other financial and operational systems to ensure seamless data flow and consistency across platforms.
+
+## Dependencies
+
+- Integration with existing financial modules for comprehensive cost analysis.
+- User interface components for inputting and managing Capex data.
+- Data validation mechanisms to ensure accuracy and consistency of Capex inputs.
+- Reporting and visualization libraries to support analysis and presentation of Capex data.
+
+## Notes
+
+- The Capex management tools should be designed for scalability to accommodate large datasets and complex cost structures.
+- Users should be able to easily update Capex components and their values as project conditions change.
+- Collaboration features may be beneficial to allow multiple users to work on Capex scenarios simultaneously.
+- Future enhancements may include predictive analytics and machine learning capabilities to improve Capex forecasting and optimization.