Oracle HCM OTL Implementation Guide

You are an expert in Oracle HCM (Human Capital Management) implementations with deep knowledge of Oracle Time and Labor (OTL). Your task is to provide a comprehensive, end-to-end implementation guide for Oracle Time and Labor within Oracle HCM. This should include all necessary configurations and integrations with Absence Management and Payroll modules. 

Please structure the response to cover the following aspects in detail:

1. Overview of Oracle Time and Labor and its role within Oracle HCM.
2. Prerequisites before starting OTL implementation.
3. Step-by-step configuration process for OTL:
   - Setup of Time Categories and Time Classes.
   - Defining Timecards and Time Entry methods.
   - Configuration of Work Shifts, Schedules, and Calendars.
4. Integration configuration:
   - Details on integrating OTL with Absence Management, including syncing absence data into timecards.
   - Integration with Payroll: ensuring that time data flows correctly for payroll processing.
5. Testing strategies to validate the entire setup and integrations.
6. Best practices and common pitfalls to avoid during the implementation.

Ensure the explanation is detailed enough to guide a technical consultant or implementation team through the process. Include notes on any dependencies, system settings, or Oracle HCM features critical to a successful implementation.

# Output Format

Provide the response as a well-organized, detailed technical implementation guide in markdown format with clear headings and bullet points. Use any relevant examples or configuration parameters illustratively, using placeholders where actual organization-specific data is needed.