Google-sheets – Search for multiple variables in multiples rows at the same time in Google Sheets/Drive

From the question

Could a script be run when the user sets the delete column to Y

Yes, it's possible by using an on edit simple/installable or on change installable triggers.

References

• https://developers.google.com/apps-script/guides/triggers

Since you are going to be using a script anyway (for email generation), might as well use one for the rearrangement.

Here's a simplified example of form input data:

+---+------------+-------+---------------+-------+-------+-------+
|   |     A      |   B   |       C       |   D   |   E   |   F   |
+---+------------+-------+---------------+-------+-------+-------+
| 1 | Date       | Job   | Details       | cat 1 | cat 2 | cat 3 |
| 2 | 10/2/2015  | Job 1 | some details  | 2     | 3     | 1     |
| 3 | 10/10/2015 | Job 2 | other details | 0     | 2     | 3     |
+---+------------+-------+---------------+-------+-------+-------+

This will be rearranged on another sheet, called "Job List" below, by this script (which can be triggered by form submission):

function processJobs() {
  var ss = SpreadsheetApp.getActiveSpreadsheet();
  var sheet = ss.getActiveSheet();
  var values = sheet.getDataRange().getValues();
  var output = [];
  for (var i = 1; i < values.length; i++) {
    for (var j = 0; j < 3; j++) {
      output = output.concat(repeat(values[i], values[0][j+3], values[i][j+3]));
    }
  }
  outputSheet = ss.getSheetByName("Job List");  
  outputSheet.getRange(2, 1, output.length, output[0].length).setValues(output);
}

function repeat(row, category, quantity) {
  var arr = [];
  for (var i = 0; i < quantity; i++) {
    arr.push([row[0], category, quantity].concat(row.slice(1,3)));
  }
  return arr;
}

Explanation: the line with values[i][j+3] refers to various category counts within the row; j+3 is set so that j=0,1,2 correspond to 3,4,5 zero-based column indices (which mean the columns D,E,F above). For each count, the function repeat is called, which produces the necessary number of repetitions.

The function repeat inserts the date, category name, quantity of workers for that category (not sure why, but you wanted it), and the rest of the job description.

The whole thing is then recorded in sheet "Job List", like so:

+----+------------+----------+----------+-------+---------------+
|    |     A      |    B     |    C     |   D   |       E       |
+----+------------+----------+----------+-------+---------------+
|  1 | Date       | Category | Quantity | Job   | Details       |
|  2 | 10/2/2015  | cat 1    | 2        | Job 1 | some details  |
|  3 | 10/2/2015  | cat 1    | 2        | Job 1 | some details  |
|  4 | 10/2/2015  | cat 2    | 3        | Job 1 | some details  |
|  5 | 10/2/2015  | cat 2    | 3        | Job 1 | some details  |
|  6 | 10/2/2015  | cat 2    | 3        | Job 1 | some details  |
|  7 | 10/2/2015  | cat 3    | 1        | Job 1 | some details  |
|  8 | 10/10/2015 | cat 2    | 2        | Job 2 | other details |
|  9 | 10/10/2015 | cat 2    | 2        | Job 2 | other details |
| 10 | 10/10/2015 | cat 3    | 3        | Job 2 | other details |
| 11 | 10/10/2015 | cat 3    | 3        | Job 2 | other details |
| 12 | 10/10/2015 | cat 3    | 3        | Job 2 | other details |
+----+------------+----------+----------+-------+---------------+

Column F can be used for student names.