<prompt> Translate the following text to SwahiliOur reviews over the past 20 years have consistently found that DODs weapon system acquisitions take much longer and cost much more than originally anticipated, causing disruptions to the departments overall investment strategy and significantly reducing its buying power.  <response>: Makadirio yetu katika miaka 20 iliyopita yamegundua mara kwa mara kwamba ununuzi wa mfumo wa silaha wa DOD huchukua muda mrefu zaidi na gharama zaidi kuliko ilivyotarajiwa awali, ikisababisha usumbufu kwa mkakati wa jumla wa uwekezaji wa idara na kupunguza nguvu yake ya ununuzi. 