TIMESUM
Aggregates between the From and To time periods to sum or average over selected periods. These can be absolute time periods or relative to the latest actual time period. It's useful when the result has no time dimension and refers to absolute time periods or time periods relative to the current period, as configured in Settings > Time > Model Calendar.
TIMESUM is appropriate when the result has no time dimension. It refers to absolute time periods or time periods relative to the current period.
MOVINGSUM requires the result to have a time dimension as it's used for moving sums and moving averages that vary over time.
Syntax
TIMESUM(x, [f] , [t], [a])
where:
 x: The line item to add up over time.
 f: The start period over which to aggregate. This period is included in the aggregation. (optional).
 t: The end period over which to aggregate. This period is included in the aggregation. (optional).
 a: Aggregation method (optional).
The TIMESUM function accepts a single mandatory parameter.

The only compulsory parameter is the line item being aggregated (x).
 If both From and To parameters are omitted, all periods are added
 If To is omitted, the period defined in the From parameter is returned
 If the Aggregate parameter is omitted, default to SUM
Missing intermediate parameters are not permitted.
The following examples are valid:
TIMESUM(P&L.Revenue)
 Sums revenue over all time periods, excluding the brought forward period, if one exists. This is useful when you do not have a total of all time periods available, such as when the General Weeks timescale is used.
TIMESUM(P&L.Revenue,0)
 Sums revenue for the current period only, including the brought forward period, if in range.
TIMESUM(P&L Revenue, Time.'Jul 14')
 Sums revenue for July 2014 only, including the brought forward period, if in range..
The following examples are not permitted, since intermediate parameters are omitted:
TIMESUM(P&L.Revenue,,,AVERAGE)
TIMESUM(P&L.Revenue,,0)
The time periods can be absolute, such as:
Time.'Apr 14'
(as per the time period label) or a number relative to the current period.

The Time.'Current Period' parameter can also be used for the defined current period.

0 = current period

1 = previous period

2 = 2 periods ago

1 = period after the current period.

The granularity of the time scale is taken from the line item. So, if the line item is in weeks, then 1 means the previous week.

Format
Input Format  Output Format 

x: Number, Boolean, date, List item, text f: Number, TIME.'Period' t: Number, TIME.'Period' a: Keyword 
Matches the data format used by argument x 
Arguments
The function uses the following arguments:
 x:
 Number: Numeric line item, property, or expression
 Boolean: Expression that equates to a Boolean result
 Date: Hardcoded date, date, or line item.
 List item: List
 Text: Textformatted line item, text constant, or general expression
 f:
(optional)
 Number: Numeric line item, property, or expression
 Time period: Number, TIME.'Period'
 t: (optional)
 Number: Numeric line item, property, or expression
 Time period: Number, TIME.'Period'
 a: (optional) Keywords: SUM, AVERAGE, MIN, MAX, ANY, ALL, FIRSTNONBLANK, LASTNONBLANK, TEXTLIST
Constraints
The function has the following constraints:
 The only compulsory parameter is the line item you're aggregating.
 If data type of source item changes and aggregate is inappropriate, then an error condition is triggered.
 The From and To parameters only support number or time periodformatted values, not dateformatted.
 Result format can be Numeric, Boolean, date, list, or text but must be the same data type as the item being summed.
Excel equivalent
 No Excel equivalent
Example
SUM for Revenue aggregations:
Last 3 months
TIMESUM(P&L Forecast.Revenue,2,0)
Last 3 quarters
TIMESUM(P&L Forecast.Qtly Revenue,2,0)
Last 3 days of Actuals
TIMESUM(P&L Forecast.Daily Revenue,2,0)
Equivalent 3 months last year
TIMESUM(P&L Forecast.Revenue,14,12)
Next 3 months forecast
TIMESUM(P&L Forecast.Revenue,1,3)
Last 3 months using Time.'Current Period'
TIMESUM(P&L Forecast.Revenue,2,Time.'Current Period')
AVERAGE for aggregations:
Average last year = TIMESUM(P&L Forecast.Revenue, Time.'Jan 13',Time.'Dec 13',AVERAGE)
TIMESUM can be particularly useful if you're building variance reports, that commonly contain summing columns for 'Current period' or 'Last 3 months':
TIMESUM(Sales,2,0)
In this example, Jun 14 is set as the Current Period for the model and TIMESUM is used to sum the Sales amounts for the Actual version for Apr 14=12,100, May 14=12,900, and Jun 14=0.