Whats the meaning of open-door?

[Emas]

English Language Proficiency Tests, Advanced Level

ESL/EFL Test #575 "Corporate Culture (2)", question 3

If a company has an ......... policy, the company encourages open communication practices between lower level employees and upper management so that all concerns are voiced and acknowledged.

(a) up-sell
(b) real time
(c) slam dunk
(d) open-door

English Language Proficiency Tests, Advanced Level

ESL/EFL Test #575 "Corporate Culture (2)", answer 3

If a company has an open-door policy, the company encourages open communication practices between lower level employees and upper management so that all concerns are voiced and acknowledged.

Correct answer: (d) open-door

Your answer was: incorrect
If a company has an real time policy, the company encourages open communication practices between lower level employees and upper management so that all concerns are voiced and acknowledged.
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whats the meaning of open-door in this sentence and why ddo we use this one specially
thnx

english student Emas

[Linda]

Hello English student,
"Open-door policy" is a common business phrase that is used to describe a management style that encourages employees to direct questions, opinions, concerns etc. to supervisors, management etc. This means, literally, that a manager's door is always open for his/her employees. This style of management promotes communication within businesses and helps lower-level employees feel more comfortable about approaching their superiors.
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