Years of Service Anniversary formula - Cognos Analytics - Costpoint 8.0.0 - validation

Question

this one has been bugging me for a few weeks... I'm trying to write a formula in Cognos Analytics (costpoint) that returns if someone is hitting a new years of service milestone in the actual month.
returning a simple "true/false" or "yes/no" is perfect
essentially it's just if their years of service fall between multiple date ranges (ex: i want a return value of "yes" for someone currently at 4.95 years of service since they would hit their 5 years within the coming month)
years of service are in number format in column "A" in excel and in column [years of service] in costpoint (cognos) (ex: 9.154, 4.982, 24.995 ...)
i got an Excel version to work seen below:
=IF(OR(AND(A1>4.91,A1<=5),(AND(A1>9.91,A1<=10)),(AND(A1>14.91,A1<=15)),(AND(A1>19.91,A1<=20)),(AND(A1>24.91,A1<=25)),(AND(A1>29.91,A1<=30))),"yes","no")
i'm still just getting familiar with Cognos(costpoint) syntax, so i tried to write it as seen below:
if(or(and([Years of Service]>4.91,[Years of Service]<5),(and([Years of Service]>14.91,[Years of Service]<15)))then ('yes') else ('null')
without any luck...
anyone want to take a crack at it?? :)

Answer 1

In the absence of start dates, which would be easier, and handling the more general case (What if they are approaching 45 years of service?):
case
when MOD(MOD([Years Of Service], 5) + 1, 5) > 0.91
and MOD(MOD([Years Of Service], 5) + 1, 5) <= 1
then 'yes'
else 'no'
end
To see who reaches a "years of service" value that is a 5-year milestone next month, create a filter:
mod(
_months_between (
_first_of_month (
_add_months (current_date, 1)
),
_first_of_month ([StartDate])
),
60
) = 0
But if you have service start dates, you can use dates calculations to see who reaches a 5-year milestone next month:
mod(
_months_between (
_first_of_month (
_add_months (current_date, 1)
),
_first_of_month ([StartDate])
),
60
)

Answer 2

Look at the various case functions and try them for your expression.

Answer 3

I don't think you need a start date, you could just focus on the decimal portion of the Years of service field. You know that if the decimal portion is equal to or above ).9166 then the years of service is in the final month.
if ([YOS]-cast([YOS],integer)>=0.9166)
then
('Yes')
else
('No')
If you want to figure a major milestone year such as 5,10,15 then you can take the expression further.
if mod(
if ([YOS]-cast([YOS],integer)>=0.9166)
then
(cast([YOS],integer)+1)
else
(cast([YOS],integer)),5=0)
then ('Milestone Year')
else ('Keep on Working!')
Hopefully the above helps!