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,
The International Space Station is the largest structure ever built in space. The first module â the Russian Zarya module â launched from Earth 15 years ago on Nov. 20 1998. International crews have continuously occupied the orbiting space laboratory since 2000, and five space agencies contributed to the building of the structure. [Cosmic Quiz: Do You Know the International Space Station?] The $100 billion International Space Station has the wingspan of a football field and the living space of a five-bedroom house. It took more than 115 spaceflights of different kinds of spacecraft to build the station, and astronauts and cosmonauts have spent more than 1,000 hours on spacewalks outside of the station. 1  Photos: Building the International Space Station. 2  How Russia's Progress Spaceships Work (Infographic)