Approve status should change

I am creating a record and sending to two Department head for approval .
I am picking the department head with a Enumlist with reference of employee table were the key is Email ID
Department head will click the approve action button ,once he click the button i am adding his email Id and record id in the log table
Once the both the department head approve the Status column should change to Approved
Can you suggest any expression.??

@Gunasuriya_Ravi
Both myself and @Steve had responded to this same exact query multiple times and under multiple and exact same but differently headered posts. May I ask your intention with this consistent flooding?



Leventk, Steve told me to post this question in new post with a detailed explanation for the Status Changing ,so i started the new Question

My question is different in this cause .Before i was asking for the action button.Now i had bit confusion in Status changing to approve .