1. In a gradual manner
   - gradually, bit by bit 
2. Proceeding in steps
   - stepwise

1. One thing at a time
   - bit-by-bit, in small stages, piecemeal, stepwise

See also: gradual

Encyclopedia: Step by step

• systema alimentarium
• systema digestorium
• systema lymphaticum
• systema nervosum
• systema nervosum centrale
• systema nervosum periphericum
• systema respiratorium
• systema skeletale
• systema urogenitale
• systematic
• systematic desensitisation
• systematic desensitization
• systematical
• systematically
• systematics
• systematisation
• systematise
• systematiser
• systematism
• systematist
• systematization
• systematize
• systematizer
• systemic
• systemic circulation