Just a couple of observations:
1. Jeppesen do not "design" instrument procedures. They re-publish procedures already in the public domain using their own format. The HKG procedures were designed to PAN OPS criteria by the HK CAD.
2. PANS OPS will give you a 30m (100ft) obstacle clearance in the initial phase of the MA until a 50m (165ft) clearance is achieved. TERPS is slightly different - the obstacle clearance is 250ft, but the obstacle assessment area is smaller, significantly so for Cat C & D aircraft.
3. OEI performance assessment and contingency planning is the responsibility of the operator. However, normally the obstacle assessment area is much smaller.