JUDGEMENTS (CONTINUED) The estimates and assumptions that have a significant risk of causing a material adjustment to the carrying amounts of assets and liabilities within the next financial year are outlined below: (continued) (f) Post-employment employee benefits The Group and the Company provide both Retirement Benefit Plan and Post-Retirement Medical Plan for certain employees. The present value of the employee benefits obligations depends on a number of factors that are determined on an actuarial basis using certain assumptions. The key assumptions used in determining the net cost/(income) for the employee benefits include discount rate, medical claim inflation rate and salary increment rate. Any changes in these assumptions will impact the carrying amount of employee benefits obligations, as disclosed in Note 24. • Discount rate The Group and the Companydetermine the appropriate discount rate at the end of each financial period. This is the interest rate that should be used to determine the present value of estimated future cash outflows expected to be required to settle the pension obligations. In determining the appropriate discount rate, the Group and the Company consider the interest rates of high-quality corporate bonds that are denominated in the currency in which the benefits will be paid and that have terms to maturity approximating the terms of the related employee benefits obligations. • Medical claim inflation rate The medical claim inflation rate for general practitioner, hospitalisation, specialist and dialysis medical claims, as determined by the Group and the Company are based on the annualised increase in average claims over the past 5 years. • Salary increment rate The salary increment rate for employees receiving the Retirement Benefit Plan as determined by the Group and the Company is based on the average salary increment rate for the past 13 years and considerations for price inflation, real salary increase, promotions and Collective Agreement (‘CA’) negotiation. 5 PROPERTY, PLANT AND