Tableau 201: How to Make a What-If Analysis Using Parameters. 17. Tableau 201: How to Make a What-If Analysis Using Parameters. Parameters are one of the most powerful tools available in Tableau for exploring your data and providing interactivity to your end users. The best way to think of parameters is that they act as wildcards.
The United States has invested almost $78 billion in the International Space Station (ISS or Station) over the last 21 years, and going forward, NASA plans to spend between $3 and $4 billion annually to maintain and operate the Station, including transportation for crew and cargo.1 In a May 2014 report,
Of that amount, NASA anticipates the need for approximately $7 billion for the development of its own deep space launch vehicle known as the Space Launch System, and the associated ground systems, to support human deep space exploration. NASA's RDT&E funding needs drop off beginning in fiscal year 2016 due to decreased investment in the commercial crew program, which funds commercial development of human spaceflight systems to support the International Space Station in low Earth orbit.