Windchill Risk and Reliability Desktop Help > Windchill LCC > LCC Support Files > LCC Variables Files > Time Intervals Pane
Time Intervals Pane
The Time Intervals pane displays the time intervals and interest rates to use in LCC calculations. While any number of time intervals can be inserted in this table, each time interval that you insert must be of the same duration. In other words, all intervals must represent the same length of time, such as one year. You cannot have one time interval represent three months, another represent one year, and a third represent six months.
To analyze costs over a five-year period, you insert five time intervals: Year 1 (or Current Year), Year 2, Year 3, Year 4, and Year 5. Similarly, to analyze costs over five six-month periods, you insert five time intervals: Period 1 (or First Sixth-Month Period), Period 2, Period 3, Period 4, and Period 5.
Rather than assuming a constant interest rate across all time intervals, you can specify an interest (or inflation) rate for each interval. This allows you to compare costs for different intervals based on today’s currency, By calculating the net present value (NPV) for each interval, you can better determine whether you want to incur a particular cost now or at some future point in time.
The following table provides column descriptions.
Column
Description
Time Interval Name
The name of the time interval.
Interest Rate
The interest (or inflation) rate to use to calculate the net present value (NPV) or cost in today’s currency for the time interval. For more information, see Net Present Value. If you are not calculating NPV, you can leave this field blank. If you enter an interest rate, you should use the same interval for this rate as for the time interval. For example, if the time intervals represent five calendar years, you enter 6.00 to indicate an interest of 6% was charged in the first, year, 5.25 to indicate an interest rate of 5.25% was charged in the second year, and so on.
Description
Any optional comments or remarks about the time interval.
Clicking Click here to insert a new record in the last table row inserts a time interval. For more information, see Inserting a Time Interval in the Time Intervals Pane.