# Evaluations Upate model query

**URL:** <https://community.geodesignhub.com/t/evaluations-upate-model-query/340>\
**Category:** Support\
**Created:** [December 25, 2017, 6:58am UTC](https://community.geodesignhub.com/t/evaluations-upate-model-query/340 "2017-12-25T06:58:54Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![f\_ernst](https://community.geodesignhub.com/letter_avatar_proxy/v4/letter/f/eb9ed0/32.png) [@f\_ernst](https://community.geodesignhub.com/u/f_ernst)\
**Post date:** [December 25, 2017, 6:58am UTC](https://community.geodesignhub.com/t/evaluations-upate-model-query/340/1 "2017-12-25T06:58:55Z")

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Hi Hrishi,  
I have a question concerning the above mentioned sheet: In the “2. Evaluations Update Model” sheet, I want to change the values for IMPACT and UPDATED EVALUATION. However, from the suggested value range of 2 to -2 the value of 2 does not show up in the scroll bar. What might be the reason for this?  
Best Regards  
Fred

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**Author:** ![hrishiballal](https://community.geodesignhub.com/user_avatar/community.geodesignhub.com/hrishiballal/32/2_2.png) [@hrishiballal](https://community.geodesignhub.com/u/hrishiballal)\
**Post date:** [December 26, 2017, 8:57pm UTC](https://community.geodesignhub.com/t/evaluations-upate-model-query/340/2 "2017-12-26T20:57:59Z")

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Hi Fred,  
Thank you for your query. A couple of things:

- The evaluation update model is a advanced feature for advanced users. It is used when you are thinking of a design in terms of time. A evaluation map is used to show a assessment of site and also show areas where intervention are required, the map is the _opinion_ of the map maker.
- If you think of a classic case of shopping mall vs road, which comes first? Should the road come first or the mall? This is a decision that the designer has to make. In this context, if a site is unsuitable for a mall (initial evaluation) and the designer puts a road the site is now suitable for a mall (updated evaluation). So the evaluation maps change as the designer makes intervention and this sheet governs how they should change.

So some rules:

- When you set a impact, you are essentially telling the platform how to change the existing evaluation. A +1 setting is changing the color to the _left_ of the existing color by 1, so a +1 Impact for a road that falls on a 3 Capable feature will convert that feature to 4 (Suitable)  

- So here is what the following means:

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**Author:** ![hrishiballal](https://community.geodesignhub.com/user_avatar/community.geodesignhub.com/hrishiballal/32/2_2.png) [@hrishiballal](https://community.geodesignhub.com/u/hrishiballal)\
**Post date:** [December 26, 2017, 8:58pm UTC](https://community.geodesignhub.com/t/evaluations-upate-model-query/340/3 "2017-12-26T20:58:06Z")

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**Author:** ![hrishiballal](https://community.geodesignhub.com/user_avatar/community.geodesignhub.com/hrishiballal/32/2_2.png) [@hrishiballal](https://community.geodesignhub.com/u/hrishiballal)\
**Post date:** [February 29, 2024, 9:12am UTC](https://community.geodesignhub.com/t/evaluations-upate-model-query/340/4 "2024-02-29T09:12:51Z")

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**Author:** ![hrishiballal](https://community.geodesignhub.com/user_avatar/community.geodesignhub.com/hrishiballal/32/2_2.png) [@hrishiballal](https://community.geodesignhub.com/u/hrishiballal)\
**Post date:** [February 29, 2024, 9:12am UTC](https://community.geodesignhub.com/t/evaluations-upate-model-query/340/5 "2024-02-29T09:12:55Z")

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