 We demonstrate the usefulness of Sigma Worksheet through two in-depth use casesand report on user feedback that we elicit through a 100-person survey followed by a semi-structured interview study with 70 participants.
<clarity>  We demonstrate the usefulness of Sigma Worksheet through two in-depth use casesand report on user feedback that we elicit through a 100-person survey followed by a semi-structured interview study with 70 participants.
 We demonstrate the usefulness of Sigma Worksheet through a 100-person survey followed by a semi-structured interview study with 70 participants.