AFI vs. DAFI vs. AFMAN vs. DAFMAN: What's the Difference?
The 'D' isn't cosmetic: it tells you the publication now covers the whole Department of the Air Force, Space Force included. Here's how to tell directive from manual and current from superseded at a glance.
publication types, 2 axes — directive vs. manual, AF vs. Department-wide.
It comes down to two questions
AFI/DAFI vs. AFMAN/DAFMAN: directive or manual
Why some have a 'D' and some don't
The currency trap when types change
FAQ
It comes down to two questions
Every one of these four labels answers exactly two yes/no questions:
- Is it a directive or a manual? Instruction (I) = directive policy. Manual (MAN) = the how-to.
- Does it cover the whole Department of the Air Force? A leading D = yes (AF + Space Force).
AFI, DAFI, AFMAN, DAFMAN are the four corners of "directive vs. manual" × "AF vs. Department-wide".
AFI/DAFI vs. AFMAN/DAFMAN: directive or manual
An Instruction (AFI/DAFI) directs what you must do and assigns responsibility. It's policy you're held to.
A Manual (AFMAN/DAFMAN) gives the how — the standards, procedures, and technical detail that carry out a directive. DAFMAN 91-203 is the safety standards manual; DAFI 91-202 is the mishap-prevention program directive that points to it.
Why some have a 'D' and some don't
The "D" prefix marks a publication redesignated under the Department of the Air Force, so it applies to both the Air Force and the Space Force. AFI 21-101 became DAFI 21-101; AFMAN 91-203 became DAFMAN 91-203.
The currency trap when types change
Redesignation is exactly when stale citations creep into checklists. The old AFI number still returns a real PDF on e-Publishing — but it's the superseded one.
That's why our library flags currency on every record. Searching "AFI 21-101" in the Lookup Tool resolves to the current DAFI 21-101 and shows you the superseded predecessor so you don't cite the wrong one.
Frequently asked questions
- Is a DAFI higher authority than an AFI?
- It's not 'higher' — it's broader. A DAFI is a Department of the Air Force Instruction covering both the Air Force and Space Force. When an AFI is redesignated as a DAFI, the DAFI is the current version.
- Can a manual override an instruction?
- No. The instruction sets policy; the manual implements it. They work together — you comply with the instruction by following the manual's procedures.
- What's an AFMAN doing if there's already an AFI?
- The AFI tells you what's required and who owns it; the AFMAN gives the detailed standards and procedures to actually do it. Many program areas have both.
- How do I know if my AFI was redesignated as a DAFI?
- Look it up — if a DAFI with the same series-number exists and is current, the plain AFI is superseded. Our library shows the supersession chain.