cwicr-rate-updater

CWICR 费率更新器

业务案例

问题陈述

资源费率会过时：

• 材料价格随市场波动
• 人工费率每年变化
• 设备成本因地区而异
• 历史费率需要调整

解决方案

系统化更新费率，整合市场数据、通胀指数和区域因素，同时保留审计追踪记录。

业务价值

• 准确性 - 反映当前市场价格
• 灵活性 - 更新特定资源或类别
• 审计追踪 - 跟踪费率随时间的变化
• 自动化 - 与价格 API 集成

技术实现

import pandas as pd
import numpy as np
from typing import Dict, Any, List, Optional, Tuple, Callable
from dataclasses import dataclass, field
from datetime import datetime, date
from enum import Enum
import json


class RateType(Enum):
    """Types of rates."""
    LABOR = "labor"
    MATERIAL = "material"
    EQUIPMENT = "equipment"
    SUBCONTRACT = "subcontract"


class AdjustmentMethod(Enum):
    """Methods for rate adjustment."""
    FIXED_AMOUNT = "fixed_amount"
    PERCENTAGE = "percentage"
    MULTIPLIER = "multiplier"
    REPLACEMENT = "replacement"


@dataclass
class RateChange:
    """Record of rate change."""
    resource_code: str
    rate_type: RateType
    old_rate: float
    new_rate: float
    change_percent: float
    change_date: datetime
    reason: str
    source: str


@dataclass
class RateUpdateResult:
    """Result of rate update operation."""
    total_items: int
    updated: int
    unchanged: int
    errors: int
    changes: List[RateChange]
    summary: Dict[str, Any]


class CWICRRateUpdater:
    """Update resource rates in CWICR data."""

    def __init__(self, cwicr_data: pd.DataFrame):
        self.data = cwicr_data.copy()
        self.change_log: List[RateChange] = []
        self.original_data = cwicr_data.copy()

    def get_current_rates(self,
                          rate_type: RateType = None,
                          category: str = None) -> pd.DataFrame:
        """Get current rates, optionally filtered."""

        df = self.data.copy()

        # Filter by category if specified
        if category and 'category' in df.columns:
            df = df[df['category'].str.contains(category, case=False, na=False)]

        # Select relevant columns based on rate type
        rate_columns = {
            RateType.LABOR: ['work_item_code', 'description', 'labor_rate', 'labor_cost'],
            RateType.MATERIAL: ['work_item_code', 'description', 'material_cost'],
            RateType.EQUIPMENT: ['work_item_code', 'description', 'equipment_cost', 'equipment_rate']
        }

        if rate_type and rate_type in rate_columns:
            cols = [c for c in rate_columns[rate_type] if c in df.columns]
            return df[cols]

        return df

    def update_rate(self,
                    work_item_code: str,
                    rate_type: RateType,
                    new_rate: float,
                    reason: str = "Manual update",
                    source: str = "User") -> Optional[RateChange]:
        """Update single rate."""

        rate_column = self._get_rate_column(rate_type)
        if rate_column not in self.data.columns:
            return None

        mask = self.data['work_item_code'] == work_item_code
        if not mask.any():
            return None

        old_rate = float(self.data.loc[mask, rate_column].iloc[0])
        self.data.loc[mask, rate_column] = new_rate

        change_percent = ((new_rate - old_rate) / old_rate * 100) if old_rate > 0 else 0

        change = RateChange(
            resource_code=work_item_code,
            rate_type=rate_type,
            old_rate=old_rate,
            new_rate=new_rate,
            change_percent=round(change_percent, 2),
            change_date=datetime.now(),
            reason=reason,
            source=source
        )

        self.change_log.append(change)
        return change

    def _get_rate_column(self, rate_type: RateType) -> str:
        """Get column name for rate type."""
        mapping = {
            RateType.LABOR: 'labor_rate',
            RateType.MATERIAL: 'material_cost',
            RateType.EQUIPMENT: 'equipment_cost',
            RateType.SUBCONTRACT: 'subcontract_cost'
        }
        return mapping.get(rate_type, 'labor_rate')

    def apply_percentage_adjustment(self,
                                     rate_type: RateType,
                                     percentage: float,
                                     category: str = None,
                                     reason: str = "Percentage adjustment") -> RateUpdateResult:
        """Apply percentage adjustment to rates."""

        rate_column = self._get_rate_column(rate_type)
        if rate_column not in self.data.columns:
            return RateUpdateResult(0, 0, 0, 1, [], {})

        # Build mask
        mask = pd.Series([True] * len(self.data))
        if category and 'category' in self.data.columns:
            mask = self.data['category'].str.contains(category, case=False, na=False)

        # Store old values
        old_values = self.data.loc[mask, rate_column].copy()

        # Apply adjustment
        multiplier = 1 + (percentage / 100)
        self.data.loc[mask, rate_column] = old_values * multiplier

        # Record changes
        changes = []
        for idx in self.data[mask].index:
            old_rate = float(old_values.loc[idx])
            new_rate = float(self.data.loc[idx, rate_column])

            if old_rate != new_rate:
                change = RateChange(
                    resource_code=str(self.data.loc[idx, 'work_item_code']),
                    rate_type=rate_type,
                    old_rate=old_rate,
                    new_rate=new_rate,
                    change_percent=percentage,
                    change_date=datetime.now(),
                    reason=reason,
                    source=f"Bulk {percentage}%"
                )
                changes.append(change)
                self.change_log.append(change)

        return RateUpdateResult(
            total_items=len(self.data[mask]),
            updated=len(changes),
            unchanged=len(self.data[mask]) - len(changes),
            errors=0,
            changes=changes,
            summary={
                'rate_type': rate_type.value,
                'adjustment_percent': percentage,
                'category': category,
                'average_new_rate': self.data.loc[mask, rate_column].mean()
            }
        )

    def apply_inflation_index(self,
                               base_year: int,
                               current_year: int,
                               inflation_rates: Dict[int, float],
                               rate_types: List[RateType] = None) -> RateUpdateResult:
        """Apply inflation index from base year to current."""

        if rate_types is None:
            rate_types = [RateType.LABOR, RateType.MATERIAL, RateType.EQUIPMENT]

        # Calculate cumulative multiplier
        cumulative_multiplier = 1.0
        for year in range(base_year, current_year):
            rate = inflation_rates.get(year, 0.02)  # Default 2%
            cumulative_multiplier *= (1 + rate)

        total_changes = []

        for rate_type in rate_types:
            result = self.apply_percentage_adjustment(
                rate_type=rate_type,
                percentage=(cumulative_multiplier - 1) * 100,
                reason=f"Inflation {base_year}-{current_year}"
            )
            total_changes.extend(result.changes)

        return RateUpdateResult(
            total_items=len(self.data),
            updated=len(total_changes),
            unchanged=len(self.data) - len(total_changes),
            errors=0,
            changes=total_changes,
            summary={
                'base_year': base_year,
                'current_year': current_year,
                'cumulative_multiplier': round(cumulative_multiplier, 4),
                'total_adjustment_percent': round((cumulative_multiplier - 1) * 100, 2)
            }
        )

    def import_external_rates(self,
                               external_data: pd.DataFrame,
                               code_column: str,
                               rate_column: str,
                               rate_type: RateType,
                               match_on: str = 'work_item_code') -> RateUpdateResult:
        """Import rates from external data source."""

        changes = []
        errors = 0
        target_column = self._get_rate_column(rate_type)

        for _, row in external_data.iterrows():
            code = row[code_column]
            new_rate = row[rate_column]

            try:
                change = self.update_rate(
                    work_item_code=code,
                    rate_type=rate_type,
                    new_rate=new_rate,
                    reason="External import",
                    source="External data"
                )
                if change:
                    changes.append(change)
            except Exception:
                errors += 1

        return RateUpdateResult(
            total_items=len(external_data),
            updated=len(changes),
            unchanged=len(external_data) - len(changes) - errors,
            errors=errors,
            changes=changes,
            summary={
                'source': 'External import',
                'rate_type': rate_type.value
            }
        )

    def apply_regional_factors(self,
                                region_factors: Dict[str, float],
                                default_factor: float = 1.0) -> RateUpdateResult:
        """Apply regional adjustment factors."""

        # This assumes region column exists or applies uniformly
        factor = region_factors.get('default', default_factor)

        labor_result = self.apply_percentage_adjustment(
            RateType.LABOR,
            (region_factors.get('labor', factor) - 1) * 100,
            reason="Regional adjustment"
        )

        material_result = self.apply_percentage_adjustment(
            RateType.MATERIAL,
            (region_factors.get('material', factor) - 1) * 100,
            reason="Regional adjustment"
        )

        equipment_result = self.apply_percentage_adjustment(
            RateType.EQUIPMENT,
            (region_factors.get('equipment', factor) - 1) * 100,
            reason="Regional adjustment"
        )

        all_changes = (labor_result.changes + material_result.changes +
                       equipment_result.changes)

        return RateUpdateResult(
            total_items=len(self.data),
            updated=len(all_changes),
            unchanged=len(self.data) * 3 - len(all_changes),
            errors=0,
            changes=all_changes,
            summary={
                'region_factors': region_factors,
                'labor_adjusted': len(labor_result.changes),
                'material_adjusted': len(material_result.changes),
                'equipment_adjusted': len(equipment_result.changes)
            }
        )

    def get_change_log(self,
                        start_date: datetime = None,
                        rate_type: RateType = None) -> List[RateChange]:
        """Get change log, optionally filtered."""

        changes = self.change_log

        if start_date:
            changes = [c for c in changes if c.change_date >= start_date]

        if rate_type:
            changes = [c for c in changes if c.rate_type == rate_type]

        return changes

    def export_change_log(self, output_path: str) -> str:
        """Export change log to Excel."""

        df = pd.DataFrame([
            {
                'Resource Code': c.resource_code,
                'Rate Type': c.rate_type.value,
                'Old Rate': c.old_rate,
                'New Rate': c.new_rate,
                'Change %': c.change_percent,
                'Date': c.change_date.strftime('%Y-%m-%d %H:%M'),
                'Reason': c.reason,
                'Source': c.source
            }
            for c in self.change_log
        ])

        df.to_excel(output_path, index=False)
        return output_path

    def rollback_changes(self,
                          since: datetime = None) -> int:
        """Rollback changes since date (returns to original data)."""

        if since is None:
            # Full rollback
            self.data = self.original_data.copy()
            count = len(self.change_log)
            self.change_log = []
            return count

        # Partial rollback - more complex, would need versioning
        return 0

    def export_updated_data(self, output_path: str) -> str:
        """Export updated CWICR data."""

        if output_path.endswith('.parquet'):
            self.data.to_parquet(output_path)
        else:
            self.data.to_excel(output_path, index=False)

        return output_path


class RateScheduler:
    """Schedule automatic rate updates."""

    def __init__(self, updater: CWICRRateUpdater):
        self.updater = updater
        self.schedules: List[Dict[str, Any]] = []

    def add_annual_labor_increase(self,
                                   percentage: float,
                                   effective_date: date) -> Dict[str, Any]:
        """Schedule annual labor rate increase."""

        schedule = {
            'id': len(self.schedules) + 1,
            'type': 'annual_labor',
            'percentage': percentage,
            'effective_date': effective_date,
            'rate_type': RateType.LABOR,
            'status': 'scheduled'
        }
        self.schedules.append(schedule)
        return schedule

    def execute_due_updates(self, current_date: date = None) -> List[RateUpdateResult]:
        """Execute all updates that are due."""

        if current_date is None:
            current_date = date.today()

        results = []

        for schedule in self.schedules:
            if schedule['status'] == 'scheduled' and schedule['effective_date'] <= current_date:
                result = self.updater.apply_percentage_adjustment(
                    rate_type=schedule['rate_type'],
                    percentage=schedule['percentage'],
                    reason=f"Scheduled {schedule['type']}"
                )
                schedule['status'] = 'executed'
                schedule['executed_date'] = current_date
                results.append(result)

        return results

快速入门

# Load CWICR data
cwicr = pd.read_parquet("TR_workitems_costs_resources_DDC_CWICR.parquet")

# Initialize updater
updater = CWICRRateUpdater(cwicr)

# Apply 5% labor rate increase
result = updater.apply_percentage_adjustment(
    rate_type=RateType.LABOR,
    percentage=5.0,
    reason="2024 Annual Increase"
)

print(f"Updated {result.updated} labor rates")
print(f"Average adjustment: {result.summary.get('adjustment_percent')}%")

常见用例

1. 通胀调整

inflation_rates = {
    2020: 0.012, 2021: 0.047, 2022: 0.065, 2023: 0.034
}
result = updater.apply_inflation_index(
    base_year=2020,
    current_year=2024,
    inflation_rates=inflation_rates
)
print(f"Cumulative adjustment: {result.summary['total_adjustment_percent']}%")

2. 区域因素

berlin_factors = {
    'labor': 1.15,
    'material': 0.95,
    'equipment': 1.05
}
result = updater.apply_regional_factors(berlin_factors)

3. 导入外部价格

market_prices = pd.read_excel("current_prices.xlsx")
result = updater.import_external_rates(
    external_data=market_prices,
    code_column='item_code',
    rate_column='price',
    rate_type=RateType.MATERIAL
)

4. 导出审计追踪记录

updater.export_change_log("rate_changes_2024.xlsx")

资源

• GitHub：OpenConstructionEstimate-DDC-CWICR
• DDC 图书：第 3.1 章 - 费率管理