audio-visual AV, constant improvement

Quote from W. Edwards Deming:

You must have a supplier relationship of constant improvement.

constant (FREQUENT)
adjective
happening a lot or all the time:
He's in constant trouble with the police.
machines that are in constant use

constantly 
adverb
all the time or frequently:
He's constantly changing his mind.
She has the television on constantly.

audio-visual Show phonetics
adjective [before noun] (ABBREVIATION AV)
describes something that involves seeing or hearing:
audio-visual equipment/aids/software

(from Cambridge Advanced Learner's Dictionary)

audio-visual

also audiovisual ( ô'dē-ō-vĭzh'ū-əl)

adj.

1. Both audible and visible.
2. (Abbr. AV) Of or relating to materials, such as films and tape recordings, that present information in audible and pictorial form: a corporation's audio-visual department.

n.
An aid, other than printed matter, that uses sight or sound to present information: language tapes, videocassettes, and other audio-visuals.
The American Heritage® Dictionary of the English Language, Fourth Edition

A/V (1) (Audio/Video) Refers to equipment and applications that deal with sound and sight. The A/V world includes microphones, tape recorders, audio mixers, still and video cameras, film projectors, slide projectors, VCRs, CD and DVD players/recorders, amplifiers and speakers. The term originally meant "audio/visual."
--Computer Encyclopedia.

AV

audio-visual; Authorized Version.

au・di・o

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━━ a. 低［可聴］周波の; 音（声）の.
━━ n. （pl. ～s） 音（の再生）; 【テレビ】音声部.
audio board　【コンピュータ】音声処理基板.
audio book　オーディオカセットブック.
audio cassette　オーディオ・カセット ((音声録音再生用)).
audio conference　電話会議.
audio frequency　低［可聴］周波.
audio・tpist　オーディオタイピスト ((録音テープから直接タイプする)).