Singapore Airlines
KrisFlyer Elite status is earned on Elite miles over a 12-month membership period on Singapore Airlines, Scoot and Star Alliance carriers; PPS Club sits above it and is earned purely on Singapore Airlines premium-cabin spend (PPS Value) over a year. Singapore Airlines is a Star Alliance member, so Elite Gold and PPS are Star Alliance Gold. Confirm current thresholds on singaporeair.com.
5 rungs, from the bottom up.
Qualification thresholds are the published ones as last checked and change most years; confirm the current numbers with Singapore Airlines. Alliance equivalences and the lounge rules that follow from them move far more slowly.