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JAY_PJAY_P 

validation rule need urgent

i have one object assect and which has one field start_mode__c field which has picklist value disable ,derate and normal option i want to create one validation rule that directly auto assign the disable value without inserting value manually 
James LoghryJames Loghry
Validation rules are for simply reporting errors if a criteria is met.  In other words, they're used for handling requiredness on an sobject, based on some formula or criteria.  For auto-assignment, take a look at processes and process builder instead.
Rupal KumarRupal Kumar
Hi,
mike_13223435
                   No Need to create Validation rule for that-
Simplly  When you create picklist then you set disable value as Default.
Step 1- Go--- Custom Fields & Relationships----Click---start mode Field------Set Disable Valu Defualt

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thanks

Rupal