# \#blocks

**URL:** https://forum.surveyengine.com/tag/blocks/159.md

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## [Multiple Draws without Replacement](https://forum.surveyengine.com/t/multiple-draws-without-replacement/202)

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**Author:** [@olivia.barnes44](https://forum.surveyengine.com/u/olivia.barnes44)\
**Replies:** 1\
**Last updated:** [16 September 2024 07:43 UTC](https://forum.surveyengine.com/t/multiple-draws-without-replacement/202 "2024-09-16T07:43:14Z")

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Hi! I am creating a rather complex survey, which requires multiple layers of randomisation, and wondered if anyone could help me figure out how to do this! I have 8 DCEs, forming 8 different treatment conditions. Each …

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## [Changing blocks post pilot](https://forum.surveyengine.com/t/changing-blocks-post-pilot/99)

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**Author:** [@Freddo](https://forum.surveyengine.com/u/Freddo)\
**Replies:** 1\
**Last updated:** [13 February 2023 22:59 UTC](https://forum.surveyengine.com/t/changing-blocks-post-pilot/99 "2023-02-13T22:59:29Z")

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The number of treatments in the design is currently 16 in 2 blocks and we will increase and revise this during the pre-test, pilot and main survey. How do we handle this?