Example of MS Access SQL IIF to T-SQL
Seems you don't have to use IIF or CASE 

(
    (
    Production.Product_Title IS NULL
    OR Production.Product_Title Like 'Process%'
    )
AND Person.Type IS NOT NULL
)


FYI, Transact-SQL has IIF function starting with 2012.

UPD

If you had to return some value:

SELECT
    CASE WHEN 
        Production.Product_Title IS NULL
        OR Production.Product_Title Like 'Process%'
    THEN 'Not Started'
    ELSE 'Started'
    END AS [ProductState]
FROM YourTable