Variation of Works for Gov. projects is different from Private projects(frm what i've studied). It involved:
i. Arahan Perubahan Kerja(APK)
ii.Wang Peruntukan Sementara(WPS)
iii. Kuantiti Kerja Sementara(KKS)
Pelarasan Harga Kontrak(PHK) is needed to finalize the above 3 cases.
All these are practice in Kementerian Pelajaran Malaysia(KPM) which is the governement of Malaysia.
i. "APK" is also known as V.O(in English). It is an order by the gov. to the consultants. It is also the 1st stage for a variation. For 2nd stage, QS needs to prepare paperworks which is the Kelulusan Perubahan Kerja(KPK) after the amount of APK has been approved by the gov. At 3rd stage(final), QS have to prepare PHK after KPK being approved.
ii. "WPS" is a type of variation for 'All Provisional' Items in the BQ only[Eg: Piling (All Provisional)]. Similarly, QS needs to prepare PHK after the amount of WPS has been approved.
iii. "KKS" is another type of variation which is for those items in Provisional Sums Bill only. As mentioned, it needs to conclude with a PHK.
& Ofcourse, the BQ mustn't follow Contrator's amount(as they claim higher for sure), but to follow the Consultant QS amount(usually the agreed one). The Government will approved according to the agreed amount.
These are those works which i'm doing&learning in my current company. Hope it'll give a brief understanding for those ppl out there who are also doing gov projects. :) -FC