Equipment Fleet Manager

Technical Implementation

python
import pandas as pd
from datetime import date, timedelta
from typing import Dict, Any, List, Optional
from dataclasses import dataclass, field
from enum import Enum


class EquipmentStatus(Enum):
    AVAILABLE = "available"
    IN_USE = "in_use"
    MAINTENANCE = "maintenance"
    REPAIR = "repair"
    RETIRED = "retired"


class EquipmentType(Enum):
    CRANE = "crane"
    EXCAVATOR = "excavator"
    LOADER = "loader"
    FORKLIFT = "forklift"
    GENERATOR = "generator"
    COMPRESSOR = "compressor"
    SCAFFOLDING = "scaffolding"
    OTHER = "other"


@dataclass
class MaintenanceRecord:
    record_id: str
    equipment_id: str
    maintenance_type: str
    scheduled_date: date
    completed_date: Optional[date]
    cost: float
    notes: str = ""


@dataclass
class Assignment:
    assignment_id: str
    equipment_id: str
    project: str
    location: str
    start_date: date
    end_date: Optional[date]
    operator: str = ""


@dataclass
class Equipment:
    equipment_id: str
    name: str
    equipment_type: EquipmentType
    make: str
    model: str
    year: int
    status: EquipmentStatus
    hourly_rate: float
    daily_rate: float
    current_hours: float = 0
    last_maintenance: Optional[date] = None
    next_maintenance_hours: float = 500
    assignments: List[Assignment] = field(default_factory=list)


class EquipmentFleetManager:
    def __init__(self, company_name: str):
        self.company_name = company_name
        self.equipment: Dict[str, Equipment] = {}
        self.maintenance_records: List[MaintenanceRecord] = {}
        self._equip_counter = 0
        self._assign_counter = 0

    def add_equipment(self, name: str, equipment_type: EquipmentType,
                     make: str, model: str, year: int,
                     hourly_rate: float, daily_rate: float) -> Equipment:
        self._equip_counter += 1
        equip_id = f"EQ-{self._equip_counter:04d}"

        equip = Equipment(
            equipment_id=equip_id,
            name=name,
            equipment_type=equipment_type,
            make=make,
            model=model,
            year=year,
            status=EquipmentStatus.AVAILABLE,
            hourly_rate=hourly_rate,
            daily_rate=daily_rate
        )
        self.equipment[equip_id] = equip
        return equip

    def assign_equipment(self, equip_id: str, project: str, location: str,
                        start_date: date, operator: str = "") -> Assignment:
        if equip_id not in self.equipment:
            return None

        self._assign_counter += 1
        assign_id = f"ASN-{self._assign_counter:04d}"

        assignment = Assignment(
            assignment_id=assign_id,
            equipment_id=equip_id,
            project=project,
            location=location,
            start_date=start_date,
            end_date=None,
            operator=operator
        )

        self.equipment[equip_id].assignments.append(assignment)
        self.equipment[equip_id].status = EquipmentStatus.IN_USE
        return assignment

    def return_equipment(self, equip_id: str, hours_used: float):
        if equip_id in self.equipment:
            equip = self.equipment[equip_id]
            equip.status = EquipmentStatus.AVAILABLE
            equip.current_hours += hours_used
            if equip.assignments:
                equip.assignments[-1].end_date = date.today()

    def schedule_maintenance(self, equip_id: str, maintenance_type: str,
                            scheduled_date: date, cost: float):
        if equip_id not in self.equipment:
            return
        record_id = f"MNT-{len(self.maintenance_records) + 1:04d}"
        record = MaintenanceRecord(record_id, equip_id, maintenance_type,
                                  scheduled_date, None, cost)
        self.maintenance_records[record_id] = record

    def get_available_equipment(self, equipment_type: EquipmentType = None) -> List[Equipment]:
        available = [e for e in self.equipment.values()
                    if e.status == EquipmentStatus.AVAILABLE]
        if equipment_type:
            available = [e for e in available if e.equipment_type == equipment_type]
        return available

    def get_utilization_report(self) -> Dict[str, Any]:
        in_use = sum(1 for e in self.equipment.values()
                    if e.status == EquipmentStatus.IN_USE)
        total = len(self.equipment)
        return {
            'total_equipment': total,
            'in_use': in_use,
            'available': sum(1 for e in self.equipment.values()
                            if e.status == EquipmentStatus.AVAILABLE),
            'maintenance': sum(1 for e in self.equipment.values()
                              if e.status == EquipmentStatus.MAINTENANCE),
            'utilization_rate': round(in_use / total * 100, 1) if total > 0 else 0
        }

    def export_fleet(self, output_path: str):
        data = [{
            'ID': e.equipment_id,
            'Name': e.name,
            'Type': e.equipment_type.value,
            'Make/Model': f"{e.make} {e.model}",
            'Year': e.year,
            'Status': e.status.value,
            'Hours': e.current_hours,
            'Daily Rate': e.daily_rate
        } for e in self.equipment.values()]
        pd.DataFrame(data).to_excel(output_path, index=False)

Quick Start

python
fleet = EquipmentFleetManager("ABC Construction")

crane = fleet.add_equipment("Tower Crane #1", EquipmentType.CRANE,
                           "Liebherr", "280 EC-H", 2020, 150, 1200)

assignment = fleet.assign_equipment(crane.equipment_id, "Office Tower",
                                   "Site A", date.today(), "John Smith")

report = fleet.get_utilization_report()
print(f"Utilization: {report['utilization_rate']}%")

Resources

• DDC Book: Chapter 3.2 - Resource Management