A spike is a product-testing method that is used to determine how much work will be required to solve or work around a software issue. Typically, a 'spike test' involves gathering additional information or testing for easily reproduced edge-cases. The term is used in agile software development methodologies like Scrum or Extreme Programming.
Uses
A spike in a sprint can be used in a number of ways:
A distinction can be made between technical spikes and functional spikes. The technical spike is used more often for evaluating the impact new technology has on the current implementation. A functional spike is used to determine the interaction with a new feature or implementation.
Following a spike, the results (a new design, a refined workflow, etc.) are shared and discussed with the team.