Resource price change won’t show in cost loading report

You can put each day in as a seperate activity and assign mutiple rates to the resource.

Thanks for your time Oliver.
The example I mentioned is obviously simplified, and by it I wanted to show that what I see is that P3 multiplies each unit by the correct price, sums it all up and then divides the sum by the budgeted quantity. The division result is shown in the cost loading report and not the correct amount for each day.
Unfortunately, the activity in my project lasts for 1522 days and has three periods with different prices-it’s much more complicated than the four-days example! It is an activity I use to record the construction site every-day operation expenses (electricity and telephone bills, secretary etc.). It has a unit of "day", a budgeted quantity of 1522 days (the construction site will operate for 1522 days) and three different prices (low costs in the beginning and near the end of the project and high costs in the middle of the duration).
I’ve already broken this activity into three separate ones, each one with its own price, but I would like to understand why P3 does that and if there is a way to show the correct sums in the cost loading report.

Electricity and telephone bills should be added as expense items and it is possible to change the accrual type for them. However the options are limited to at the start/end of the activity or uniformally across its entire duration.

The default is uniformal accrrual and thus your expense budget for the activity is divided across the duration which is why you would end up with 150/day (as in the 4 day example).

You could create multiple activities with seperate calendars for the each phase of costs across the project with non working time for the days which attract a different rate, but it all seems too much work for the sake of a few hundred pounds of earned value per day!?

Kalimera Demosthenis.
This feature is implemented in P6 and named ’future period bucket’ planning. In P3..P5 to get the right Res/Cost loading you have to either split up the activity or play with S curve definition. Now in P6 you just manually type in resource usage per each timeframe and that’s it. Just like in MS Project.
If you will have any questions - feel free to contact me.

Regards,
Andrew

Many thanks to both of you gentlemen.