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As they couldn't trust the new scheme, the management decided not to stop using the old one. |
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Till they were certain about the usefulness of the new scheme, the management resolved to use it alongside the old one. |
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According to the management, both the old and the new scheme were to be used at the same time until one proved itself better. |
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Both of the schemes were to be used till the management decided one of them was worthwhile. |
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The management chose to use the old and the new schemes alternately so that they could see if it was worth using only one. |