Data Sequencing Linkgage

Sequencing

I'm struggling to describe this problem so it's proving elusive to search for a solution. I trust, however, that there's a way forward with Alteryx. Here's the scenario: 

We have layouts that are effective for periods of time.  When new ones arrive, they succeed prior versions of those layouts.  The data has a layout ID which is unique to each event, and a prior layout ID along with effective dates.  The effective dates are not necessarily reliable are are included here for illustration purposes.

I need to link these sequences of layouts together as a 'layout group' so I can run analysis on what has changed with these layouts. I've been playing with a multi-row formula but am struggling to put my thumb on the process to make this work. 

Here's what initial data might look like:

Current Layout	Prior Layout	From	To
14	12	12/1/2018	1/1/2019
13	11	12/1/2018	1/1/2019
12	10	11/1/2018	12/1/2018
11	9	11/1/2018	12/1/2018
10	8	10/1/2018	11/1/2018
9	7	10/1/2018	11/1/2018
8	6	9/1/2018	10/1/2018
7	5	9/1/2018	10/1/2018
6	4	8/1/2018	9/1/2018
5	3	8/1/2018	9/1/2018
4	2	7/1/2018	8/1/2018
3	1	7/1/2018	8/1/2018

And this is what I'm looking to transform it to, with the layout grouping to flag:

Current Layout	Prior Layout	From	To	Layout Group
13	11	12/1/2018	1/1/2019	13
11	9	11/1/2018	12/1/2018	13
9	7	10/1/2018	11/1/2018	13
7	5	9/1/2018	10/1/2018	13
5	3	8/1/2018	9/1/2018	13
3	1	7/1/2018	8/1/2018	13
14	12	12/1/2018	1/1/2019	14
12	10	11/1/2018	12/1/2018	14
10	8	10/1/2018	11/1/2018	14
8	6	9/1/2018	10/1/2018	14
6	4	8/1/2018	9/1/2018	14
4	2	7/1/2018	8/1/2018	14

And as a side question, what in the world would this exercise be called?  I'm sure it's been done before but am struggling to name it.

Thableaus

Hi @Sequencing 

Make Group tool will make your job easy.

Using Make Group tool you separate the layout groups. Then you get the max value of each group and join that to your dataset.

Cheers,

MakeGroup.yxmd