I am trying to get a return value of "Yes" or "No", pertaining to if a
patient has arrived 15 minutes early for an appointment.

Cell B5 has the appointment scheduled time
Cell c5 has the time the patient actually arrived for the appointment

Both B5 and C5 have custom formatting = #":"00, so the end user can enter
time without the colon, and still have the spreadsheet calculate.


Cell M5 contains the following formula:
=IF((60*(24*(IF((((INT(B7/100)/24)+((B7-(INT(B7/100)*100))/1440))<(INT(C7/100)/24)+((C7-(INT(C7/100)*100))/1440)),
((INT(C7/100)/24)+((C7-(INT(C7/100)*100))/1440)-1+(INT(B7/100)/24)+((B7-(INT(B7/100)*100))/1440)),
((INT(C7/100)/24)+((C7-(INT(C7/100)*100))/1440)-((INT(B7/100)/24)+((B7-(INT(B7/100)*100))/1440)))))))<(15),"Yes","No")


The M5 formula returns a "Yes" as soon as any time is entered in b5.
The M5 formula does not change to "No" once a time is entered in C5, if B5
is earlier than 1200.

B5 C5 M5
15:25 15:30 Yes
10:40 10:57 Yes

I hope this is enough information.

Any assistance is appreciated.


Glenn