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ACBC MustHave/Unacceptable Differences Between Analysis Counts and Manual Counts

Hello,

we conducted an ACBC Analysis for a university project. While sorting the data we found differences between the counts of unacceptable and must have data.

While the analysis tool of Sawtooth shows us 7 respondents who chose a certain level as unacceptable we count only 4 when manually counting the answers. Is this a result of missing attributes (attributes that didn't appear in the questionnaire) being marked as unacceptables or/and a result of marked must haves that automatically marked all other levels as unacceptables?

But more importantly: We manually count many more marked must haves than the analysis counting tool shows us. Where could that come from?

Thank you very much in advance and all the best!
asked Jun 15, 2017 by anonymous
retagged Jun 19, 2017 by Walter Williams

1 Answer

0 votes
Here's some documentation on that area, from the Help area of ACBC.  Perhaps it can help you work through the inconsistencies you are seeing:

How Unacceptables and Must-Haves Are Determined

Unacceptables:

1. VIA CONSTRUCTED LISTS: If the researcher has specified to treat missing attributes or levels as unacceptable, those are marked as unacceptable for the respondent.

2. INFERRED FROM MUST-HAVE QUESTION: For Attributes with Sequence Order set to "None", if the respondent indicates that one level is must-have, all other levels are marked unacceptable.

3. INFERRED FROM MUST-HAVE QUESTION: For Attributes with Sequence Order, the respondent indicates that a certain level is a "must-have" threshold (e.g. must have "at least" or "at most" this level). Any levels lower (if at least) or higher (if at most) than this level are marked unacceptable.

For example, suppose MPG (miles per gallon) is the attribute in question with levels 20MPG, 25MPG, 30MPG, and 35MPG. If the respondent marks that "at least" 30MPG is a must-have, 20MPG and 25MPG are marked unacceptable.

As a second example, if Seating Capacity is the attribute in question with levels 4-person, 5-person, 6-person, 7-person, and 8-person. If the respondent marks that "at most" 7-person seating is a must-have, 8-person is marked unacceptable.

4. DIRECTLY FROM UNACCEPTABLE QUESTION: For Attributes with Preference Order set to "None", if a respondent indicates a level is unacceptable, it is marked as unacceptable.

5. DIRECTLY FROM UNACCEPTABLE QUESTION: For Attributes with Preference Order, if the respondent indicates that a certain level is unacceptable, that level and any levels less preferred than it are marked unacceptable.

Exception in the case of constructed lists: If an attribute is marked as having preference order, if an "unacceptable" level (omitted due to constructed list) is "more preferred" than the first "acceptable" level, it is changed to "acceptable".
answered Jun 15, 2017 by Bryan Orme Platinum Sawtooth Software, Inc. (132,190 points)
And, here's the documentation about "Must Haves":

Must Haves:

 

1. If an attribute has only one level not marked as unacceptable, it is a "must-have."

2. If an attribute is marked as having preference order, the first "most preferred" acceptable level is marked as "must-have."
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