<prompt> Translate the following text to EnglishMatatizo ya muda mrefu ya huduma ya posta katika mahusiano ya wafanyakazi na usimamizi yanaonyesha umuhimu wa kuwa na seti ya pamoja ya malengo ya muda mrefu na mikakati iliyokubaliwa na wasimamizi, wafanyakazi, na vyama vya wafanyakazi.  <response>: Postal Services long-standing challenges in labor-management relations illustrate the importance of having a shared set of long-term goals and strategies agreed upon by managers, employees, and unions. 