Oracle Time and Labor (OTL)

I have encountered OTL while using Projects. For me time entry was done in OTL and it was integrated with Projects. Three kinds of time entry is possible for OTL; employees entering for themselves via an OAF screen, assigned users entering for different employees (Authorized Delegate method) via an OAF screen and assigned users entering for different employees (Timekeeper method) via a Forms screen.
Following is a more comprehensive definition of the module

"Oracle Time and Labor automates the entire time and attendance record-keeping process and provides an intuitive, web-based interface for time entry and approval. It offers a simplified way to submit, review, track and approve timecards. At the same time, it helps you control costs and time worked, consolidate timecard information, and adhere to organizational time management rules.

Integrate and Streamline Your HR Processes
Oracle Time and Labor is part of Oracle Human Resources Management family of applications, and integrates seamlessly with other Human Resources applications, including Human Resources(core) and Payroll. Oracle Time and Labor also is a key module in Oracle's enterprise project management solution, Oracle Projects.

BENEFITS
Enter Time Anytime, Anywhere

Enter time via web browser, mobile device, or even offline using a timecard template that can be uploaded later.
Streamline Management

Enable approvers to search timecards and view summary information. Perform mass approvals. Gain flexible configurations for approvals workflow.
Enforce Policies

Define rotation plans based on shifts and work plans. Define which employees can charge to which organizations in your company. Support policies for holidays, overtime, and rounding.
Automate Timecard Creation

Automatically generate a timecard or group of timecards from work schedule, last timecard, or a project stored in Oracle Projects Resource Management.
Create Single Source of Entry

Improve reporting, extracting, and processing with a single database of employee time-related information. Share data with Oracle Projects, Oracle Human Resources, and Oracle Payroll."

http://www.oracle.com/us/products/applications/ebusiness/human-capital-management/053631.html