Business Rules Vs Rollup Fields Vs Calculated Fields

Feature	Trigger	Execution	Client / Server	Functions	Scope	Conditions	Fields
Business Rules	OnLoad	Synchrounous / Real Time	Client: Specific Forms/ All Forms/	Show Error Message	Entity / All Forms / Specific Forms	And / OR, not a mixure	All Fields on the form body
	On Change	Execution order:	Server	Set Field
		First: System Java Scripts		Set Business Required
		Then: Custom Java script		Set Visibility
		Finally:Business Rules		Set Default Value
				Lock / Unlock Field
Rollup Fields	On Save / Every 1-12 hours / When User Presses Rollup Refresh Button	Asynchronous / Every 1-12 hours	Server	SUM / MAX / MIN / COUNT / AVG	Related Entity / Parent Child Relationship Upto 1 Level Deep	And / OR, not mixure	Whole Number
		Rollups are calculated by scheduled system jobs Settings > System Jobs > View > Recurring System Jobs. System Job type: Mass Calculate Rollup Field or Calculate Rollup Field					Decimal
							Currency
							Date
Calculated Fields	OnSave	Synchronous	Server	ADDHOURS,	Entity/ Parent Child Relationship Upto1 Level Deep	AND or OR , Not a mix of both	Single line of text
				ADDDAYS,			Option Set
				ADDWEEKS,			Two Options
				ADDMONTHS,			Whole Number
				ADDYEARS,			Decimal Number
				SUBTRACTHOURS,			Currency
				SUBTRACTDAYS,			Date and Time
				SUBTRACTWEEKS,
				SUBTRACTMONTHS,
				SUBTRACTYEARS,
				DIFFINDAYS,
				DIFFINHOURS,
				DIFFINMINUTES,
				DIFFINMONTHS,
				DIFFINWEEKS,
				DIFFINYEARS,
				CONCAT,
				TRIMLEFT, and TRIMRIGHT.