Information needed for both financial and information based calculations of direct labour cost per hour is presented first. In Thailand most direct labourers always work overtime, normal daily working hours is 8 and then usually 2-4 hours extra overtime per day. In this example the labourer works 48/6=8 hours normal and 18/6=3 hours overtime each working day resulting in 11 hours 6 days a week.
The hourly rate for overtime is higher than the normal working hours. A sum of the normal hours and overtime hours with their respective hourly rates multiplied with four, to represent a month, gives us 11880 Baht as a monthly salary in this example.
Completing salary by financials and salary by information and comparing with own knowledge assures a reasonable direct labour cost per hour can be attained for use in the cost estimation model.