Calculate weeks of stock based on future demand

[Anonymous]

I have 2 tables: (1) Current Items & on-hand counts, (2) Forecasted weekly demand by item for the next year. Linked by item number. 

I'm trying to understand how many weeks of stock (WOS) I have on-hand for each item today.

For example I have 100 units of Item A. The next 5 weeks of demand look like this:

Week 1: 20

Week 2: 12

Week 3: 40

Week 4: 55

Week 5: 30

In the 4th week, I run out of stock, so my WOS is 3 or 3.5 (I'm ok with either). How do I calculate this, by item? I'm comfortable with DAX but have a feeling Power Query is the answer here. Thanks!

[mb0307]

@Anonymous  possible for you to share the pbix file with measure accepted as solution below please?  I am struggling with similar scenario.

[alexei7]

Hi @Anonymous,

Can you post some sample data from your two tables?

Or if it's sensitive, create some dummy data?

Alex

[Anonymous]

On-hands: 

Item Number	Item Description	Location	OH Quantity
49928	Item A	Loc 1	231
49928	Item A	Loc 2	559
49928	Item A	Loc 3	378
71594	Item B	Loc 1	650
71594	Item B	Loc 2	3562
71594	Item B	Loc 3	693
73224	Item C	Loc 2	770
73224	Item C	Loc 3	317

Demand:

Item Number	Item Description	Location	Week Beginning	Weekly Demand
49928	Item A	Loc 1	6/3/2018	32
49928	Item A	Loc 2	6/3/2018	213
49928	Item A	Loc 3	6/3/2018	119
71594	Item B	Loc 1	6/3/2018	126
71594	Item B	Loc 2	6/3/2018	592
71594	Item B	Loc 3	6/3/2018	102
73224	Item C	Loc 2	6/3/2018	125
73224	Item C	Loc 3	6/3/2018	67
49928	Item A	Loc 1	6/10/2018	43
49928	Item A	Loc 2	6/10/2018	53
49928	Item A	Loc 3	6/10/2018	71
71594	Item B	Loc 1	6/10/2018	158
71594	Item B	Loc 2	6/10/2018	1210
71594	Item B	Loc 3	6/10/2018	67
73224	Item C	Loc 2	6/10/2018	201
73224	Item C	Loc 3	6/10/2018	2
49928	Item A	Loc 1	6/17/2018	30
49928	Item A	Loc 2	6/17/2018	234
49928	Item A	Loc 3	6/17/2018	201
71594	Item B	Loc 1	6/17/2018	68
71594	Item B	Loc 2	6/17/2018	730
71594	Item B	Loc 3	6/17/2018	176
73224	Item C	Loc 2	6/17/2018	212
73224	Item C	Loc 3	6/17/2018	73
49928	Item A	Loc 1	6/24/2018	104
49928	Item A	Loc 2	6/24/2018	174
49928	Item A	Loc 3	6/24/2018	175
71594	Item B	Loc 1	6/24/2018	133
71594	Item B	Loc 2	6/24/2018	750
71594	Item B	Loc 3	6/24/2018	160
73224	Item C	Loc 2	6/24/2018	168
73224	Item C	Loc 3	6/24/2018	199
49928	Item A	Loc 1	7/1/2018	64
49928	Item A	Loc 2	7/1/2018	176
49928	Item A	Loc 3	7/1/2018	184
71594	Item B	Loc 1	7/1/2018	174
71594	Item B	Loc 2	7/1/2018	480
71594	Item B	Loc 3	7/1/2018	188
73224	Item C	Loc 2	7/1/2018	124
73224	Item C	Loc 3	7/1/2018	84

[Anonymous · Accepted solution]

HI @Anonymous,

If you mean calculate max available week of forecasted data, you can refer to below formula.

Calculate column at demand table:

Remain = 
VAR onHand =
    LOOKUPVALUE (
        'On-Hand'[OH Quantity],
        'On-Hand'[Item Number], [Item Number],
        'On-Hand'[Location], [Location],
        'On-Hand'[Item Description], [Item Description]
    )
RETURN
    onHand
        - SUMX (
            FILTER (
                ALL ( Demand ),
                [Week Beginning] <= EARLIER ( Demand[Week Beginning] )
                    && [Item Number] = EARLIER ( Demand[Item Number] )
                    && [Item Description] = EARLIER ( Demand[Item Description] )
                    && [Location] = EARLIER ( Demand[Location] )
            ),
            [Weekly Demand]
        )

Calculate column at On-hand table:

Forecasted available Week = 
VAR _date =
    MAXX (
        FILTER (
            ALL ( Demand ),
            Demand[Item Description] = 'On-Hand'[Item Description]
                && Demand[Item Number] = 'On-Hand'[Item Number]
                && Demand[Location] = 'On-Hand'[Location]
                && [Remain] >= 0
        ),
        [Week Beginning]
    )
RETURN
    WEEKNUM ( _date, 1 ) & "/"
        & YEAR ( _date )

Result:

Regards,

Xiaoxin Sheng

[gardas_swathi]

HI,

I have exactly similar requirement. The Solution provided here does not give the expected WOS - 3.5 or 3. It is returning the forecasted available date

Can someone help me by taking the same data as sample , but i will need a measure to calculate WOS based on selection of product

[Anonymous]

I have the same requirement, Do you have any solution so far? Thanks