ATC may authorize a standard instrument approach procedure, which serves either one of parallel runways that are separated by 1,200' or less, followed by a straight-in landing on the adjacent runway
Side-Step Procedures:
Aircraft that will execute a side-step maneuver will be cleared for a specified approach procedure and landing on the adjacent parallel runway
"Cleared ILS runway 7 left approach, side-step to runway 7 right"
Side-step maneuvers should be executed as soon as possible after spotting the runway environment
Compliance with minimum altitudes associated with step-down fixes is expected even after the side-step maneuver is initiated
Side-step minima are flown to a MDA regardless of the approach authorized
Landing minimums to the adjacent runway will be based on non-precision criteria and therefore higher than the precision minimums to the primary runway, but will normally be lower than the published circling minimums
Conclusion:
To learn more about instrument procedures, be sure to check out the Instrument Procedures Handbook online or on paperback