Definition of Terms

Advisor Course Recommendation Form (Advisor CRF)

A web form in UniTime that advisors use to submit a list of courses and alternate courses in priority order that is shared with the student. The Advisor CRF will then auto-populate the student’s CRF.

Course Request Form (Course Request, CRF, Student Course Request Form)

A web form in UniTime that students use to submit a list of courses and alternative courses in priority order that are ultimately fed into an optimized scheduling algorithm that attempts to satisfy each individual student’s request while attempting to do the greatest good for the greatest number in terms of meeting student demand for courses.

Critical Course

A course that a student must be able to pass to persist and succeed in a particular major.  This definition assumes student must be successful in passing the course.  Ex:  Students who want to be nurses, for example, should know that they are expected to be proficient in courses like biology in order to be successful.  Additionally, this definition includes a course that must be completed by a given semester in order to progress towards degree completion or a service course offered outside of the student's home college where space is limited.

  • What is not a critical course:
    1. A selective whereby the student has opportunities to choose a course from a list of possible options.
    2. A course whereby the department controls space for their students enrolled in a particular major and the student is guaranteed a seat in the course.

Extended Drop/Add

The act of requesting a change to a registration which may including dropping and/or adding one or more course sections. Extended Drop/Add requests must always be approved by advisors; instructors must be notified of all drops and must approve all adds; at certain times during the semester, departmental designees may also need to approve registration changes.

Extended Drop/Add Period

The time period when registration changes require additional approvals (advisor, instructor, departmental designee).

Open Registration

A time period after batch pre-registration has occurred when all students can make modifications to their schedule, using a Time Ticket/PIN.

Pre-Registration Simulations

Once the schedule of classes is published each semester, UniTime will start running nightly simulations in the Batch Solver Dashboard. The simulations provide course enrollment projections, an estimate of what courses a student might be assigned, and assist in problem solving prior to the final batch run.

Pre-Register/Batch Registration

The process by which all undergraduate students build course requests and submit to UniTime using the Course Request Form. UniTime gathers all course requests and applies it to its optimization algorithm to minimize course conflicts, minimize travel times, accommodate space constraints, faculty requirements, and increase fairness across the student body.

Time Ticket/PIN

An assigned timeframe when a student can enroll/modify courses for a particular semester. Time tickets are based upon total credit hours earned and other criteria.  Time Tickets are used in conjunction with a 6-digit randomly assigned PIN that allows the student access into the UniTime Scheduling Assistant only during open registration Professional/graduate students will use this process to register and will not use Pre-Registration.

Purdue University, 610 Purdue Mall, West Lafayette, IN 47907, (765) 494-4600

2015 Purdue University | An equal access/equal opportunity university | Copyright Complaints | Maintained by Office of Registrar

Need accessibility help? For help with this page, contact Office of the Registrar at