Iteration 2 - DATA_ENGINEER
Sequence: 4
Timestamp: 2025-07-27 23:24:02

Prompt:
You are a senior database architect implementing schema modifications for iteration 2. Based on the OR expert's optimization requirements and mapping analysis, you will design and implement the complete database architecture following industry best practices.

YOUR RESPONSIBILITIES:
- Analyze OR expert's mapping evaluations and missing requirements
- Design schema adjustments following database normalization principles
- Implement complete data dictionary with business-oriented descriptions
- Manage business configuration logic parameters (scalar values and formulas not suitable for tables)
- Maintain business realism by preserving relevant non-optimization tables
- Follow industry database design standards and naming conventions
- Ensure each table will store between 3 and 20 data rows for realistic optimization scenarios
- Apply the 3-row minimum rule - if optimization information is insufficient to generate at least 3 meaningful rows for a table, move that information to business_configuration_logic.json instead.


BUSINESS CONFIGURATION LOGIC DESIGN:
- Create business_configuration_logic.json for business parameters
- For scalar parameters: Use "sample_value" as templates for triple expert
- For business logic formulas: Use actual formula expressions (not "sample_value")
- Support different configuration_types:
  - "scalar_parameter": Single business values with "sample_value" (resources, limits, thresholds)
  - "business_logic_formula": Actual calculation formulas using real expressions
  - "business_metric": Performance evaluation metrics with "sample_value"
- Triple expert will later provide realistic values for scalar parameters only
- Formulas should be actual business logic expressions, not sample values


CRITICAL: Respond with ONLY a valid JSON object. No explanations, no markdown, no extra text.

OR EXPERT ANALYSIS (iteration 2):
{
  "database_id": "roller_coaster",
  "iteration": 1,
  "business_context": "A theme park company aims to optimize the allocation of maintenance resources across its roller coasters to minimize downtime while ensuring safety standards are met. The company needs to decide how many maintenance hours to allocate to each roller coaster, considering constraints like maximum available maintenance hours and minimum safety requirements.",
  "optimization_problem_description": "The goal is to minimize the total downtime of roller coasters by optimally allocating maintenance hours. Each roller coaster has a specific maintenance requirement to ensure safety, and there is a limited number of maintenance hours available. The optimization will determine the number of maintenance hours allocated to each roller coaster to minimize downtime while meeting safety requirements.",
  "optimization_formulation": {
    "objective": "minimize total_downtime = \u2211(downtime_coefficient[i] \u00d7 maintenance_hours[i])",
    "decision_variables": "maintenance_hours[i] for each roller coaster i, where maintenance_hours[i] is continuous",
    "constraints": [
      "\u2211(maintenance_hours[i]) <= total_available_hours",
      "maintenance_hours[i] >= minimum_required_hours[i] for each roller coaster i",
      "maintenance_hours[i] <= maximum_possible_hours[i] for each roller coaster i"
    ]
  },
  "current_optimization_to_schema_mapping": {
    "objective_coefficients": {
      "downtime_coefficient[i]": {
        "currently_mapped_to": "downtime_coefficients.coefficient",
        "mapping_adequacy": "good",
        "description": "Impact of maintenance hours on downtime for each roller coaster"
      }
    },
    "constraint_bounds": {
      "total_available_hours": {
        "currently_mapped_to": "business_configuration_logic.total_available_hours",
        "mapping_adequacy": "good",
        "description": "Total number of maintenance hours available across all roller coasters"
      },
      "minimum_required_hours[i]": {
        "currently_mapped_to": "business_configuration_logic.minimum_required_hours_formula",
        "mapping_adequacy": "missing",
        "description": "Minimum maintenance hours required for safety for each roller coaster"
      },
      "maximum_possible_hours[i]": {
        "currently_mapped_to": "business_configuration_logic.maximum_possible_hours_formula",
        "mapping_adequacy": "missing",
        "description": "Maximum maintenance hours that can be allocated to each roller coaster"
      }
    },
    "decision_variables": {
      "maintenance_hours[i]": {
        "currently_mapped_to": "roller_coaster_maintenance.hours",
        "mapping_adequacy": "good",
        "description": "Number of maintenance hours allocated to each roller coaster",
        "variable_type": "continuous"
      }
    }
  },
  "missing_optimization_requirements": [
    "minimum_required_hours[i]",
    "maximum_possible_hours[i]"
  ],
  "iteration_status": {
    "complete": false,
    "confidence": "medium",
    "next_focus": "Gather missing data for minimum and maximum maintenance hour constraints"
  }
}


CURRENT DATABASE SCHEMA:
```sql
-- Iteration 1 Database Schema
-- Objective: Schema changes include creating tables for decision variables, objective coefficients, and constraint bounds. Business configuration logic is updated to include scalar parameters and formulas for optimization constraints.

CREATE TABLE roller_coaster_maintenance (
  roller_coaster_id INTEGER,
  hours FLOAT
);

CREATE TABLE downtime_coefficients (
  roller_coaster_id INTEGER,
  coefficient FLOAT
);


```


CURRENT DATA DICTIONARY:
{
  "tables": {
    "roller_coaster_maintenance": {
      "business_purpose": "Stores maintenance hours allocated to each roller coaster",
      "optimization_role": "decision_variables",
      "columns": {
        "roller_coaster_id": {
          "data_type": "INTEGER",
          "business_meaning": "Unique identifier for each roller coaster",
          "optimization_purpose": "Identifies the roller coaster for maintenance allocation",
          "sample_values": "1, 2, 3"
        },
        "hours": {
          "data_type": "FLOAT",
          "business_meaning": "Number of maintenance hours allocated",
          "optimization_purpose": "Decision variable for maintenance allocation",
          "sample_values": "5.0, 10.0, 15.0"
        }
      }
    },
    "downtime_coefficients": {
      "business_purpose": "Represents downtime impact per maintenance hour for each roller coaster",
      "optimization_role": "objective_coefficients",
      "columns": {
        "roller_coaster_id": {
          "data_type": "INTEGER",
          "business_meaning": "Unique identifier for each roller coaster",
          "optimization_purpose": "Identifies the roller coaster for downtime coefficient",
          "sample_values": "1, 2, 3"
        },
        "coefficient": {
          "data_type": "FLOAT",
          "business_meaning": "Impact of maintenance hours on downtime",
          "optimization_purpose": "Coefficient in the objective function",
          "sample_values": "0.5, 0.3, 0.2"
        }
      }
    }
  }
}


CURRENT BUSINESS CONFIGURATION LOGIC:
{
  "total_available_hours": {
    "sample_value": 100,
    "data_type": "INTEGER",
    "business_meaning": "Total number of maintenance hours available across all roller coasters",
    "optimization_role": "Constraint bound for total maintenance hours",
    "configuration_type": "scalar_parameter"
  },
  "minimum_required_hours_formula": {
    "formula_expression": "maintenance_hours[i] >= minimum_required_hours[i]",
    "data_type": "STRING",
    "business_meaning": "Ensures each roller coaster receives minimum maintenance hours for safety",
    "optimization_role": "Constraint formula for minimum maintenance hours",
    "configuration_type": "business_logic_formula"
  },
  "maximum_possible_hours_formula": {
    "formula_expression": "maintenance_hours[i] <= maximum_possible_hours[i]",
    "data_type": "STRING",
    "business_meaning": "Limits the maximum maintenance hours that can be allocated to each roller coaster",
    "optimization_role": "Constraint formula for maximum maintenance hours",
    "configuration_type": "business_logic_formula"
  }
}


TASK: Implement comprehensive schema changes and configuration logic management based on OR expert's requirements.

JSON STRUCTURE REQUIRED:

{
  "database_id": "roller_coaster",
  "iteration": 2,
  "implementation_summary": "Summary of schema changes and configuration logic updates based on OR expert mapping analysis",
  
  "or_requirements_analysis": {
    "mapping_gaps_identified": [
      "List specific gaps identified from OR expert's mapping_adequacy assessments"
    ],
    "missing_data_requirements": [
      "List missing optimization data requirements from OR expert"
    ],
    "business_configuration_logic_needs": [
      "Scalar parameters and formulas better suited for configuration than tables"
    ]
  },
  
  "schema_adjustment_decisions": {
    "tables_to_delete": [
      {
        "table_name": "table_name",
        "reason": "business justification for removal (optimization irrelevant vs business irrelevant)"
      }
    ],
    "tables_to_create": [
      {
        "table_name": "table_name", 
        "purpose": "optimization role (decision_variables/objective_coefficients/constraint_bounds/business_data)",
        "business_meaning": "what this table represents in business context"
      }
    ],
    "tables_to_modify": [
      {
        "table_name": "existing_table",
        "changes": "specific modifications needed",
        "reason": "why these changes address OR expert's mapping gaps"
      }
    ]
  },
  
  "business_configuration_logic_updates": {
    "configuration_parameters": {
      "parameter_name": {
        "sample_value": "sample_parameter_value",
        "data_type": "INTEGER/FLOAT/STRING/BOOLEAN",
        "business_meaning": "what this parameter represents in business context",
        "optimization_role": "how this parameter is used in optimization model",
        "configuration_type": "scalar_parameter"
      },
      "formula_name": {
        "formula_expression": "actual_business_formula_expression",
        "data_type": "STRING",
        "business_meaning": "what this formula represents in business context",
        "optimization_role": "how this formula is used in optimization model",
        "configuration_type": "business_logic_formula"
      }
    },
    "updates_rationale": "why these parameters are better in configuration logic than tables"
  },
  
  "implemented_optimization_mapping": {
    "objective_coefficients_mapping": {
      "coefficient_name[indices]": "table.column OR business_configuration_logic.key - complete mapping path"
    },
    "constraint_bounds_mapping": {
      "constraint_name[indices]": "table.column OR business_configuration_logic.key - complete mapping path"  
    },
    "decision_variables_mapping": {
      "variable_name[indices]": "table.column OR business_configuration_logic.key - complete mapping path"
    }
  },
  
  "data_dictionary": {
    "tables": {
      "table_name": {
        "business_purpose": "business meaning of this table for linear optimization",
        "optimization_role": "decision_variables/objective_coefficients/constraint_bounds/business_data",
        "columns": {
          "column_name": {
            "data_type": "TYPE",
            "business_meaning": "what this column represents in business context for linear optimization",
            "optimization_purpose": "how this column is used in linear optimization formulation",
            "sample_values": "example values or range"
          }
        }
      }
    }
  },
  
  "data_mapping": {
    "objective_sources": ["table.column pairs for linear objective function"],
    "constraint_sources": ["table.column pairs for linear constraints"],
    "sample_data_rows": {"table1": 3, "table2": 5}
  },
  
  "validation": {
    "schema_complete": true,
    "data_consistent": true,
    "math_traceable": true,
    "business_aligned": true,
    "follows_db_standards": true
  }
}

Response:
{
  "database_id": "roller_coaster",
  "iteration": 2,
  "implementation_summary": "Schema adjustments include adding tables for minimum and maximum maintenance hours constraints, updating business configuration logic for scalar parameters and formulas, and ensuring all mappings are complete and adequate.",
  "or_requirements_analysis": {
    "mapping_gaps_identified": [
      "minimum_required_hours[i] mapping missing",
      "maximum_possible_hours[i] mapping missing"
    ],
    "missing_data_requirements": [
      "Data for minimum and maximum maintenance hour constraints"
    ],
    "business_configuration_logic_needs": [
      "minimum_required_hours[i] as business_logic_formula",
      "maximum_possible_hours[i] as business_logic_formula"
    ]
  },
  "schema_adjustment_decisions": {
    "tables_to_delete": [],
    "tables_to_create": [
      {
        "table_name": "maintenance_constraints",
        "purpose": "constraint_bounds",
        "business_meaning": "Stores minimum and maximum maintenance hours constraints for each roller coaster"
      }
    ],
    "tables_to_modify": []
  },
  "business_configuration_logic_updates": {
    "configuration_parameters": {
      "total_available_hours": {
        "sample_value": 100,
        "data_type": "INTEGER",
        "business_meaning": "Total number of maintenance hours available across all roller coasters",
        "optimization_role": "Constraint bound for total maintenance hours",
        "configuration_type": "scalar_parameter"
      },
      "minimum_required_hours_formula": {
        "formula_expression": "maintenance_hours[i] >= minimum_required_hours[i]",
        "data_type": "STRING",
        "business_meaning": "Ensures each roller coaster receives minimum maintenance hours for safety",
        "optimization_role": "Constraint formula for minimum maintenance hours",
        "configuration_type": "business_logic_formula"
      },
      "maximum_possible_hours_formula": {
        "formula_expression": "maintenance_hours[i] <= maximum_possible_hours[i]",
        "data_type": "STRING",
        "business_meaning": "Limits the maximum maintenance hours that can be allocated to each roller coaster",
        "optimization_role": "Constraint formula for maximum maintenance hours",
        "configuration_type": "business_logic_formula"
      }
    },
    "updates_rationale": "These parameters are better suited for configuration logic as they represent constraints applicable across all roller coasters rather than specific data points."
  },
  "implemented_optimization_mapping": {
    "objective_coefficients_mapping": {
      "downtime_coefficient[i]": "downtime_coefficients.coefficient"
    },
    "constraint_bounds_mapping": {
      "total_available_hours": "business_configuration_logic.total_available_hours",
      "minimum_required_hours[i]": "business_configuration_logic.minimum_required_hours_formula",
      "maximum_possible_hours[i]": "business_configuration_logic.maximum_possible_hours_formula"
    },
    "decision_variables_mapping": {
      "maintenance_hours[i]": "roller_coaster_maintenance.hours"
    }
  },
  "data_dictionary": {
    "tables": {
      "roller_coaster_maintenance": {
        "business_purpose": "Stores maintenance hours allocated to each roller coaster",
        "optimization_role": "decision_variables",
        "columns": {
          "roller_coaster_id": {
            "data_type": "INTEGER",
            "business_meaning": "Unique identifier for each roller coaster",
            "optimization_purpose": "Identifies the roller coaster for maintenance allocation",
            "sample_values": "1, 2, 3"
          },
          "hours": {
            "data_type": "FLOAT",
            "business_meaning": "Number of maintenance hours allocated",
            "optimization_purpose": "Decision variable for maintenance allocation",
            "sample_values": "5.0, 10.0, 15.0"
          }
        }
      },
      "downtime_coefficients": {
        "business_purpose": "Represents downtime impact per maintenance hour for each roller coaster",
        "optimization_role": "objective_coefficients",
        "columns": {
          "roller_coaster_id": {
            "data_type": "INTEGER",
            "business_meaning": "Unique identifier for each roller coaster",
            "optimization_purpose": "Identifies the roller coaster for downtime coefficient",
            "sample_values": "1, 2, 3"
          },
          "coefficient": {
            "data_type": "FLOAT",
            "business_meaning": "Impact of maintenance hours on downtime",
            "optimization_purpose": "Coefficient in the objective function",
            "sample_values": "0.5, 0.3, 0.2"
          }
        }
      },
      "maintenance_constraints": {
        "business_purpose": "Stores minimum and maximum maintenance hours constraints for each roller coaster",
        "optimization_role": "constraint_bounds",
        "columns": {
          "roller_coaster_id": {
            "data_type": "INTEGER",
            "business_meaning": "Unique identifier for each roller coaster",
            "optimization_purpose": "Identifies the roller coaster for constraint application",
            "sample_values": "1, 2, 3"
          },
          "minimum_hours": {
            "data_type": "FLOAT",
            "business_meaning": "Minimum maintenance hours required for safety",
            "optimization_purpose": "Lower bound constraint for maintenance hours",
            "sample_values": "2.0, 3.0, 4.0"
          },
          "maximum_hours": {
            "data_type": "FLOAT",
            "business_meaning": "Maximum maintenance hours that can be allocated",
            "optimization_purpose": "Upper bound constraint for maintenance hours",
            "sample_values": "8.0, 10.0, 12.0"
          }
        }
      }
    }
  },
  "data_mapping": {
    "objective_sources": [
      "downtime_coefficients.coefficient"
    ],
    "constraint_sources": [
      "business_configuration_logic.total_available_hours",
      "maintenance_constraints.minimum_hours",
      "maintenance_constraints.maximum_hours"
    ],
    "sample_data_rows": {
      "roller_coaster_maintenance": 3,
      "downtime_coefficients": 3,
      "maintenance_constraints": 3
    }
  },
  "validation": {
    "schema_complete": true,
    "data_consistent": true,
    "math_traceable": true,
    "business_aligned": true,
    "follows_db_standards": true
  }
}
